100000 - Document - DOCUMENT AND ENTITY INFORMATION
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100010 - Statement - CONSOLIDATED BALANCE SHEETS
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100020 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)
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100030 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS
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100040 - Statement - STATEMENTS OF COMPREHENSIVE LOSS
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100050 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY
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100060 - Statement - CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical)
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100070 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS
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995455 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
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995465 - Disclosure - FAIR VALUE MEASUREMENTS
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995475 - Disclosure - PROPERTY AND EQUIPMENT
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995485 - Disclosure - LICENSE AGREEMENT
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995495 - Disclosure - ACCRUED LIABILITIES
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995505 - Disclosure - COMMITMENTS AND CONTINGENCIES
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995515 - Disclosure - OPERATING LEASES
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995525 - Disclosure - DEBT
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995535 - Disclosure - STOCKHOLDERS' EQUITY
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995545 - Disclosure - INCOME TAXES
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995555 - Disclosure - CONSOLIDATED STATEMENTS OF CASH FLOWS DATA
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995565 - Disclosure - SUBSEQUENT EVENTS
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995575 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)
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995585 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)
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995595 - Disclosure - PROPERTY AND EQUIPMENT (Tables)
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995605 - Disclosure - ACCRUED LIABILITIES (Tables)
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995615 - Disclosure - OPERATING LEASES (Tables)
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995625 - Disclosure - DEBT (Tables)
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995635 - Disclosure - STOCKHOLDERS' EQUITY (Tables)
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995645 - Disclosure - INCOME TAXES (Tables)
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995655 - Disclosure - CONSOLIDATED STATEMENTS OF CASH FLOWS DATA (Tables)
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995665 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NET LOSS PER SHARE (Detail)
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995675 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NET LOSS PER SHARE (Detail1)
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995685 - Disclosure - ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - USEFUL LIVES OF ASSETS (Details)
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995695 - Disclosure - FAIR VALUE MEASUREMENTS - SECURITY TYPE (Details)
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995705 - Disclosure - FAIR VALUE MEASUREMENTS - SECURITIES WITH UNREALIZED LOSSES (Details)
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995715 - Disclosure - FAIR VALUE MEASUREMENTS - RECURRING BASIS (Details)
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995725 - Disclosure - FAIR VALUE MEASUREMENTS - EQUITY INVESTMENT (Details)
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995735 - Disclosure - FAIR VALUE MEASUREMENTS - CREDIT RISK (Details)
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995745 - Disclosure - PROPERTY AND EQUIPMENT (Details)
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995755 - Disclosure - LICENSE AGREEMENTS (Details)
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995765 - Disclosure - ACCRUED LIABILITIES (Details)
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995775 - Disclosure - COMMITMENTS AND CONTINGENCIES - Litigation Settlement (Details)
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995785 - Disclosure - COMMITMENTS AND CONTINGENCIES - Severance Plan (Details)
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995795 - Disclosure - OPERATING LEASES (Details)
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995805 - Disclosure - OPERATING LEASES - COMPONENTS OF LEASE COSTS (Details)
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995815 - Disclosure - OPERATING LEASES - UNDISCOUNTED FUTURE NON-CANCELLABLE LEASE PAYMENTS (Details) 2
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995825 - Disclosure - OPERATING LEASES - UNDISCOUNTED FUTURE NON-CANCELLABLE LEASE PAYMENTS (Details)
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995835 - Disclosure - DEBT - Additional Information (Details)
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995845 - Disclosure - DEBT - Schedule of Future Minimum Payments Under Term Loan Facility (Details)
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995855 - Disclosure - STOCKHOLDERS' EQUITY - AUTHORIZED COMMON STOCK (Details)
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995865 - Disclosure - STOCKHOLDERS' EQUITY - PUBLIC OFFERING (Details)
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995875 - Disclosure - STOCKHOLDERS' EQUITY - WARRANT EXERCISES (Details)
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995885 - Disclosure - STOCKHOLDERS' EQUITY - SALES AGREEMENTS (Details)
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995895 - Disclosure - STOCKHOLDERS' EQUITY - EQUITY PLANS (Details)
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995905 - Disclosure - STOCKHOLDERS' EQUITY - EQUITY PLANS - SCHEDULE OF AGGREGATE STOCK OPTION AND AWARD ACTIVITY (Details)
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995915 - Disclosure - STOCKHOLDERS' EQUITY - EQUITY PLANS - SCHEDULE OF AGGREGATE STOCK OPTION AND AWARD ACTIVITY (Parenthetical) (Details)
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995925 - Disclosure - STOCKHOLDERS' EQUITY - EMPLOYEE STOCK PURCHASE PLAN (Details)
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995935 - Disclosure - STOCKHOLDERS' EQUITY - PERFORMANCE BASED STOCK OPTIONS (Details)
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995945 - Disclosure - STOCKHOLDERS' EQUITY - STOCK-BASED COMPENSATION EXPENSE FOR EMPLOYEES AND DIRECTORS (Details)
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995955 - Disclosure - STOCKHOLDERS' EQUITY - PRICING MODEL ASSUMPTIONS (Details)
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995965 - Disclosure - STOCKHOLDERS' EQUITY - STOCK-BASED COMPENSATION TO SERVICE PROVIDERS (Details)
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995975 - Disclosure - STOCKHOLDERS' EQUITY - COMMON STOCK RESERVED FOR FUTURE ISSUANCE (Details)
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995985 - Disclosure - INCOME TAXES - EFFECTIVE INCOME TAX RATE (Details)
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995995 - Disclosure - INCOME TAXES - DEFERRED TAXES (Details)
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996005 - Disclosure - INCOME TAXES - OPERATING LOSS CARRYFORWARDS (Details)
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996015 - Disclosure - INCOME TAXES - TAX CREDIT CARRYFORWARDS (Details)
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996025 - Disclosure - INCOME TAXES - CARES ACT IMPACT (Details)
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996035 - Disclosure - INCOME TAXES - UNRECOGNIZED TAX BENEFITS (Details)
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996045 - Disclosure - CONSOLIDATED STATEMENTS OF CASH FLOWS DATA - Supplemental Investing Activities (Details)
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996055 - Disclosure - SUBSEQUENT EVENTS - Additional Information (Details)
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Represents the duration of new offering period in a case where the fair market value of common stock on the purchase date is less than the fair market value at the beginning of the offering period.
Share Based Compensation Arrangement By Share Based Payment Award Duration Of New Offering Period
Duration of the new offering period
Auditor Firm ID
Auditor Firm ID
Debt Securities, Available-for-Sale [Abstract]
Marketable securities:
2024
Lessee, Operating Lease, Liability, to be Paid, Year One
Collaborative Arrangement and Arrangement Other than Collaborative [Domain]
Collaborative Arrangement and Arrangement Other than Collaborative
Document Transition Report
Document Transition Report
Amount before allocation of valuation allowances of deferred tax asset attributable to the treatment of research and development costs.
Deferred Tax Assets Capitalized Research And Development
Capitalized research and development
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term
Balance at the end of the period
Money Market Funds [Member]
Money market funds
Increase (Decrease) in Other Accrued Liabilities
Accrued liabilities
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax
OCI, Debt Securities, Available-for-Sale, Gain (Loss), after Adjustment, before Tax, Total
Net unrealized loss on marketable securities
Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period
Vesting period of stock options
Debt Securities, Available-for-Sale
Estimated Fair Value
Debt Securities, Available-for-Sale, Total
Minimum percentage of six-month product revenue forecast to satisfy minimum cash balance debt covenant.
Debt covenant percentage of product revenue against forecast
Minimum cash balance requirement to be met as a percentage of six-month product revenue against forecast
Tabular disclosure of common stock reserved for future issuance, which may include but is not limited to outstanding options and outstanding warrants.
Schedule Of Common Stock Reserved For Future Issuance Table [Text Block]
Schedule of common stock reserved for future issuance
Fair Value, Inputs, Level 1 [Member]
Level 1
Entity Public Float
Entity Public Float
2027
Lessee, Operating Lease, Liability, to be Paid, Year Four
Public offering.
Public Offering [Table]
Public Offering [Table]
Fair Value Disclosures [Text Block]
FAIR VALUE MEASUREMENTS
Income Tax, Policy [Policy Text Block]
Income Taxes
Property, Plant and Equipment, Useful Life
Estimated useful lives of assets
Revenue from Contract with Customer, Excluding Assessed Tax
License fees and royalties
Government sponsored enterprise securities due in less than one year.
Government Sponsored Enterprise Securities Due In Less Than One Year [Member]
Government-sponsored enterprise securities (due in less than one year)
At Market Issuance Sales Agreements.
At Market Issuance Sales Agreements [Line Items]
At Market Issuance Sales Agreements [Line Items]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount
Compensation cost not yet recognized, net of estimated forfeitures (in dollars)
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount
Increase (decrease) in valuation allowance
ICFR Auditor Attestation Flag
ICFR Auditor Attestation Flag
Menlo park office space lease.
Menlo Park Office Space Lease [Member]
Menlo Park Office Space Lease
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months
Less Than 12 Months - Estimated Fair Value
Percentage of loan amount outstanding to be held as minimum cash balance under debt covenant.
Debt covenant minimum cash balance percentage of loan amount
Minimum cash balance as a percentage of loan amount outstanding
Title of Individual [Domain]
Operating lease term additional period extension.
Operating Lease Term Additional Period Extension
Operating lease term, additional period extension
Represents information pertaining to unsecured promissory note (generally negotiable) that provides institutions with short-term funds ), due in less than one year.
Commercial Paper Due In Less Than One Year [Member]
Commercial paper (due in less than one year)
Subsequent Events [Text Block]
SUBSEQUENT EVENTS
Municipal securities due in one to two years member.
Municipal Securities Due In One To Two Years [Member]
Municipal securities (due in one to two years)
Stock Issued During Period, Shares, Issued for Services
Stock-based compensation related to issuance of common stock and options in exchange for services (in shares)
Shares issued (in shares)
Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]
Schedule of financial instruments measured at fair value on recurring basis
Operating Lease, Liability, Noncurrent
Noncurrent operating lease liabilities
Silicon Valley Bank.
Silicon Valley Bank [Member]
Debt Securities, Available-for-Sale [Table]
Debt Securities Available For Sale [Table]
2020 Public Offering of Common Stock and Warrants.
Two Thousand Twenty Public Offering Of Common Stock And Warrants [Member]
2020 Public Offering of Common Stock and Warrants
Option two min cash debt covenant.
Option Two Min Cash Debt Covenant [Member]
Debt discount amount
Debt Instrument, Unamortized Discount
Less: unamortized debt discount and issuance costs
Debt Instrument, Unamortized Discount, Total
Assets, Current
Total current assets
Vesting [Domain]
Liabilities and Equity
Total liabilities and stockholders' equity
Minimum cash covenant required upon certain licensing transactions being executed.
Debt Covenant Min Cash Upon Licensing Transaction
Debt covenant minimum cash balance upon licensing transaction
Entity Address, State or Province
Entity Address, State or Province
Litigation Case [Domain]
Deferred Tax Assets, Other
Other
US Treasury securities due in one to two years member.
U S Treasury Securities Due In One To Two Years [Member]
U.S. Treasury securities (due in one to two years)
Stock Issued During Period, Value, New Issues
Issuance of common stock in connection with at market offering, net of issuance costs
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number
Balance at the end of the period (in shares)
Balance at the beginning of the period (in shares)
Stock options outstanding (in shares)
Supplier [Domain]
Supplier
Represents the percentage of costs that Geron must pay during certain phases of the agreement.
Collaborative Arrangement Cost Sharing Percentage Of Entity
Percentage of costs to be paid by Geron
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted average estimated fair value of employee stock options granted (in dollars per share)
Comprehensive Income (Loss), Net of Tax, Attributable to Parent
Comprehensive loss
Tranche B [Member]
Tranche B [Member]
Tranche B [Member]
Trading Symbol
Trading Symbol
Deferred Tax Assets, Net of Valuation Allowance
Net deferred tax assets
Directors’ market value stock purchase plan.
Directors Market Value Stock Purchase Plan [Member]
Directors Market Value Stock Purchase Plan
Common Stock, Shares, Issued
Common stock, shares issued
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Percent
Stock-based compensation
Debt Securities, Available-for-Sale [Line Items]
Schedule Of Available For Sale Securities [Line Items]
2025
Long-Term Debt, Maturity, Year Two
Represents the number of options to be granted to purchase shares in each year during the optionee's service on the Board of Directors.
Share Based Compensation Arrangement By Share Based Payment Award Options To Be Granted To Purchase Shares
Stock options to be granted to purchase shares (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value
Total fair value of restricted stock that vested
Prepaid Expense and Other Assets, Current
Prepaid and other current assets
At The Market Offering Member.
At The Market Offering [Member]
At The Market Offering
Municipal securities due in less than one year.
Municipal Securities Due In Less Than One Year [Member]
Municipal securities (due in less than a year)
Municipal securities (due in less than one year)
Public offering.
Public Offering [Line Items]
Public Offering [Line Items]
Schedule of Long-Term Debt Instruments [Table]
Debt Instrument [Table]
Litigation Settlement, Amount Awarded to Other Party
Litigation settlement, amount
2026
Lessee, Operating Lease, Liability, to be Paid, Year Three
Common Stock, Capital Shares Reserved for Future Issuance
Common stock, shares reserved for future issuance (in shares)
Common stock reserved for future issuance (in shares)
AOCI Attributable to Parent [Member]
Accumulated Other Comprehensive Gain (Loss)
Long-Term Debt, Current Maturities
Less: current portion of debt
Long-Term Debt, Current Maturities, Total
Less: current portion of debt
Number of new shares issued during the period in connection with exercise of warrants.
Issuance Of Common Stock In Connection With Warrant Exercise Shares
Issuance of common stock in connection exercise of warrants (in shares)
Entity Address, City or Town
Entity Address, City or Town
Cost method investment ownership percentage.
Cost Method Investment Ownership Percentage
Cost method investments ownership percentage
Common stock outstanding warrants to purchase
Class of Warrant or Right, Outstanding
Warrants outstanding (in shares)
Lessee, Operating Lease, Renewal Term
Operating lease term, option to extend additional period
Cash Flow, Supplemental Disclosures [Text Block]
CONSOLIDATED STATEMENTS OF CASH FLOWS DATA
Summary of Investment Holdings [Line Items]
Debt Disclosure [Text Block]
DEBT
Property, Plant and Equipment [Table Text Block]
Schedule of property and equipment, stated at cost
Operating lease rent abatement period.
Operating Lease Rent Abatement Period
Operating lease, rent abatement period
Subsequent Event [Member]
Subsequent Event
Subsequent Event Type [Axis]
Subsequent Event Type
Additional Paid-in Capital [Member]
Additional Paid-In Capital
Carrying value as of the balance sheet date of obligations incurred through that date and payable for clinical related costs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
Accrued Clinical Research Organizations And Clinical Trial Costs Current
CRO and clinical trial costs
Proceeds from Maturities, Prepayments and Calls of Debt Securities, Available-for-Sale
Proceeds from maturities of marketable securities
Liabilities, Current [Abstract]
Current liabilities:
Two thousand twenty two purchase warrants.
Two Thousand Twenty Two Purchase Warrants [Member]
2022 Purchase Warrants
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer
12 Months or Greater - Estimated Fair Value
Assets, Current [Abstract]
Current assets:
Carrying amount as of the balance sheet date of obligations due to counterparty. For classified balance sheets, represents the current portion of such liabilities (due within one year or within the normal operating cycle if longer).
Due To Counter Party
Amount due to Janssen Biotech, Inc.
Counterparty Name [Axis]
Counterparty Name
Gain on Sale of Investments
Gain on sales of available for sale securities
Preferred Stock, Par or Stated Value Per Share
Preferred stock, par value (in dollars per share)
No definition available.
License Agreement Disclosure [Abstract]
Statement of Stockholders' Equity [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price
Stock options fully vested and expected to vest at the end of the period (in dollars per share)
Operating Lease, Liability, Current
Operating lease liabilities
US Treasury Notes Securities [Member]
U.S. Treasury securities
Debt Instrument, Maturity Date
Term loan maturity date
Deferred tax assets federal and state credits.
Deferred Tax Assets Federal And State Credits
Federal and state tax credits
Long-Term Debt
Carrying value of term loan, net
Long-Term Debt, Total
Property, Plant and Equipment, Net
Property and equipment, net
Property and equipment, net
Represents the number of consecutive purchase periods in an offering period in the purchase plan.
Share Based Compensation Arrangement By Share Based Payment Award Number Of Consecutive Purchase Periods In Each Offering Period
Number of consecutive purchase periods in an offering period
Investment Income, Interest
Interest income
Tranche one.
Tranche One [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value
Stock options fully vested and expected to vest at the end of the period (in dollars)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent
Tax at statutory rate
Statement of Comprehensive Income [Abstract]
Scenario [Domain]
Scenario
Collaborative Arrangement and Arrangement Other than Collaborative [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative
Entity Central Index Key
Entity Central Index Key
Warrants to purchase common stock, shares
Class of Warrant or Right, Number of Securities Called by Warrants or Rights
Warrants to purchase common stock, shares
Plan Name [Domain]
Plan Name
Issuance of common stock in connection with public offering
Issuance of common stock in connection with public offering (in shares)
Number of new shares of common stock issued during the period in connection with public offering.
Share Of Common Stock Issued During Period Shares New Issues Public Offering
Assets, Fair Value Disclosure
Total
Assets, Fair Value Disclosure, Total
Third Amendment [Member]
Third Amendment [Member]
Third amendment.
Preferred Stock, Shares Outstanding
Preferred stock, shares outstanding
Preferred Stock, Shares Outstanding, Beginning Balance
Preferred Stock, Shares Outstanding, Ending Balance
Tranche A [Member]
Tranche A [Member]
Tranche A [Member]
Liabilities, Current
Total current liabilities
Entity Tax Identification Number
Entity Tax Identification Number
Other comprehensive income (loss)
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax
OCI, Debt Securities, Available-for-Sale, Gain (Loss), before Adjustment, after Tax, Total
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table]
Schedule Of Antidilutive Securities Excluded From Computation Of Earnings Per Share [Table]
Increase (Decrease) in Operating Capital [Abstract]
Changes in assets and liabilities:
Financial Instruments [Domain]
Financial Instruments
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-Based Compensation Cost
Stock-based compensation
The number of shares under options that were cancelled or that expired during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.
Share Based Compensation Forfeitures And Expirations In Period Net
Stock options cancelled/forfeited/expired (in shares)
Lessee, Operating Leases [Text Block]
OPERATING LEASES
Restricted Stock [Member]
Restricted stock awards
Cash and Cash Equivalents [Abstract]
Included in cash and cash equivalents:
Class of Warrant or Right [Line Items]
Plan Name [Axis]
Plan Name
Lessee, Operating Lease, Term of Contract
Operating lease, initial term
Assets
Total assets
Operating Lease, Right-of-Use Asset
Operating Lease, Right-of-Use Asset
Operating leases, right-of-use assets
Entity Registrant Name
Entity Registrant Name
Components of Deferred Tax Assets [Abstract]
Significant components of deferred tax assets
Proceeds from Issuance or Sale of Equity
Net proceeds from public offering after deducting underwriting discount and other offering expenses
Proceeds from Issuance or Sale of Equity, Total
Lessee, Lease, Description [Line Items]
Lessee Lease Description [Line Items]
Retained Earnings (Accumulated Deficit)
Accumulated deficit
Retained Earnings (Accumulated Deficit), Total
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss
Less Than 12 Months - Gross Unrealized Losses
Supplemental Cash Flow Information [Abstract]
Supplemental operating and investing activities:
Retained Earnings [Member]
Accumulated Deficit
Accrued end of term charge.
Accrued End Of Term Charge
Accrued end of term charge
Prepayment charge assessed upon debt prepayment occurring 36 months after June 30, 2022 under second amendment.
Dollar prepayment charge 36 months after effective date
Charge for prepayment occurring 36 months after effective date
Represents information pertaining to debentures, bonds and other debt securities issued by US government sponsored entities (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Excludes debt issued by the Government National Mortgage Association (GNMA or Ginnie Mae, due in less than one year.
U S Government Sponsored Enterprises Debt Securities Due In Less Than One Year [Member]
Government-sponsored enterprise securities (due in less than one year)
Represents information pertaining to the Janssen Biotech Inc.
Janssen Biotech Inc [Member]
Janssen Biotech
Minimum [Member]
Minimum [Member]
Minimum
Proceeds from Stock Options Exercised
Cash received from exercise of stock options (in dollars)
Operating Lease, Liability
Operating Lease, Liability
Operating Lease, Liability, Total
Weighted Average Remaining Contractual Life (In years)
Share Based Compensation Arrangement By Share Based Payment Award Options Weighted Average Remaining Contractual Life [Abstract]
Weight Average Remaining Contractual Life (in years) - Options Outstanding
Forecast [Member]
Scenario Forecast [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Minimum
Expected volatility range, minimum (as a percent)
Equity Component [Domain]
Equity Component
Defined Contribution Plan, Cost
Amortization related to 401(k) contributions
Valuation Allowance [Abstract]
Valuation allowance
Two thousand and eighteen inducement award plan.
Two Thousand And Eighteen Inducement Award Plan [Member]
2018 Inducement Award Plan
Amortization of Debt Issuance Costs and Discounts
Amortization of debt issuance costs/debt discount
Amortization of Debt Issuance Costs and Discounts, Total
Increase decrease in operating lease liabilities.
Increase Decrease In Operating Lease Liabilities
Operating lease liabilities
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Assumptions used to estimate fair value of awards
Represents the maximum expiration term of options granted to employees having more than 10 % outstanding common stock.
Share Based Compensation By Share Based Payment Award Options Maximum Expiration Term For Options Granted To Optionees With Ownership Of More Than10 Percentage Of Common Stock
Maximum expiration term of stock options granted to employees having more than 10 % outstanding common stock
The increase (decrease) during the reporting period in the amount due for interest payments related to marketable securities and in other amounts due to the reporting entity, which are not otherwise defined in the taxonomy.
Increase Decrease In Accrued Interest Receivable Net And Other Receivables
Interest and other receivables
Operating Loss Carryforwards [Table]
Operating Loss Carryforwards [Table]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net, Total
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net
Less: unamortized debt discount and issuance costs
2022 pre-funded warrant.
Two Thousand Twenty Two Pre Funded Warrant [Member]
2022 Pre-Funded Warrant
Measurement Frequency [Axis]
Measurement Frequency
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Weighted Average Exercise Price Per Share - Options Outstanding
Debt Disclosure [Abstract]
Variable interest rate
Debt Instrument, Basis Spread on Variable Rate
Percentage added to prime rate for debt instrument interest rate
Entity Current Reporting Status
Entity Current Reporting Status
Common Stock, Shares Authorized
Common stock, shares authorized
Unrealized Gain (Loss), Foreign Currency Transaction, before Tax
Gain (loss) related to foreign currency translation
Debt, Policy [Policy Text Block]
Debt Issuance Costs and Debt Discounts
Organization, Consolidation and Presentation of Financial Statements Disclosure and Significant Accounting Policies [Text Block]
ORGANIZATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES
Share-Based Payment Arrangement, Activity [Table Text Block]
Schedule of aggregate stock option and award activity
Assets [Abstract]
ASSETS
Proceeds from Issuance of Common Stock
Proceeds from issuances of common stock from at market offerings, net of paid issuance costs
Hercules and Silicon Valley Bank. member.
Hercules And Silicon Valley Bank [Member]
Hercules and Silicon Valley Bank [Member]
Revenue from Contract with Customer [Policy Text Block]
Revenue Recognition
Shares available for grant
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Available for Grant
Balance at the end of the period (in shares)
Balance at the beginning of the period (in shares)
Stock options and awards available for grant (in shares)
First date to available to drawdown any amount under a tranche.
Borrowing Available Start Date
Start date to borrow under a tranche for a debt instrument
Common stock, $0.001 par value; 1,350,000,000 shares authorized; 544,912,215 and 390,262,524 shares issued and outstanding at December 31, 2023 and 2022, respectively
Common Stock, Value, Issued
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent
Change in valuation allowance
Shareholders' Equity and Share-Based Payments [Text Block]
STOCKHOLDERS' EQUITY
Shares Available For Grant
Share Based Compensation Arrangement By Share Based Payment Award Shares Available For Grant Roll Forward
Shares Available For Grant
Represents the aggregate offering price for which the entity may elect to issue and sell shares of its common stock under the sales agreement.
Common Stock Aggregate Offering Price
Aggregate offering price of common stock
Furniture and Fixtures [Member]
Furniture and computer equipment
Accrued Liabilities, Current
Accrued liabilities
Accrued liabilities
Current Fiscal Year End Date
Current Fiscal Year End Date
Share-Based Payment Arrangement, Noncash Expense
Stock-based compensation for employees and directors
Share-Based Payment Arrangement, Noncash Expense, Total
Auditor Name
Auditor Name
Operating Income (Loss)
Loss from operations
Debt Issuance Costs, Gross
Debt issuance costs
Research and Development Expense [Member]
Research and development
Unrecognized Tax Benefits, Decrease Resulting from Prior Period Tax Positions
Decrease related to prior year tax positions
Represents the gross unrealized losses for cash and cash equivalents.
Cash And Cash Equivalents Unrealized Losses
Gross Unrealized Losses
Lessee, Leases [Policy Text Block]
Leases
severance plans
Number Of Severance Plan
Number of severance plan.
Accounts Payable and Accrued Liabilities Disclosure [Text Block]
ACCRUED LIABILITIES
Share-Based Payment Arrangement, Expense
Stock-based compensation expense included in operating expenses
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate, Maximum
Expected volatility range, maximum (as a percent)
Aggregate value of term loan, including accrued interest payable and end of term charge.
Long Term Debt Gross
Total
At Market Issuance Sales Agreements.
At Market Issuance Sales Agreements [Table]
At Market Issuance Sales Agreements [Table]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value
Balance at the end of the period (in dollars)
Added percentage to current interest rate under debt instrument to past due amounts.
Percentage Of Interest On Past Due Outstanding
Additional percentage of interest on past due amounts
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]
Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table]
Principle amount
Debt Instrument, Face Amount
Earnings Per Share, Policy [Policy Text Block]
Net Loss Per Share
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions
Increase related to current year tax positions
Effective Income Tax Rate Reconciliation, Tax Credit, Percent
Federal and state tax credits
Effective Income Tax Rate Reconciliation, Tax Credit, Percent, Total
Other Nonoperating Income (Expense)
Other Nonoperating Income (Expense), Total
Other income , net
Public offering price per share
Sale of Stock, Price Per Share
Combined public offering price per share of pre-funded warrants and accompanying stock purchase warrants
Lessee, Operating Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract]
Operating Lease Liabilities, Payments Due
Operating Expenses [Abstract]
Operating expenses:
Property, Plant and Equipment [Abstract]
Depreciation, Depletion and Amortization, Nonproduction
Depreciation and amortization
Depreciation, Depletion and Amortization, Nonproduction, Total
Entity Voluntary Filers
Entity Voluntary Filers
Subsequent Events [Abstract]
Represents the number of offering periods in which an employee can participate at a time in the purchase plan.
Share Based Compensation Arrangement By Share Based Payment Award Maximum Number Of Offering Periods In Which Employee May Participate At One Time
Number of offering periods in which an employee can participate at a time
Issuance of Stock and Warrants for Services or Claims
Stock-based compensation for services by non-employees
Stock-based compensation for services by non-employees
US Government-sponsored Enterprises Debt Securities [Member]
Government-sponsored enterprise securities
New jersey office space lease.
New Jersey Office Space Lease [Member]
New Jersey Office Space Lease
Commitments and Contingencies Disclosure [Abstract]
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross
Stock options granted (in shares)
Stock options granted (in shares)
Stock options granted (in shares)
Other Accrued Liabilities, Current
Other
Concentration Risks, Types, No Concentration Percentage [Abstract]
Credit Risk
Interest Paid, Excluding Capitalized Interest, Operating Activities
Cash paid for interest
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Gain, before Tax
Gross Unrealized Gains
Minimum market capitalization required for this option to be available to meet the minimum cash balance debt covenant.
Market cap minimum to use option two
Minimum market capitalization requirement for option
Represents the percentage of maximum commission rate, based on gross proceeds of sale price per share of common stock sold through sales agent under the sales agreement.
Maximum Commission Rate
Maximum commission rate (as a percent)
Equity, Attributable to Parent [Abstract]
Stockholders' equity:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value on a Recurring Basis
Investment Owned, Fair Value, Ending Balance
Investment Owned, Fair Value, Beginning Balance
Investment Owned, Fair Value
Fair value of equity investment
Lessee, Operating Lease, Liability, to be Paid, after Year Five
Thereafter
Lease, Cost [Table Text Block]
Components of lease costs
Loss Contingency Nature [Axis]
Line of Credit Facility, Maximum Borrowing Capacity
Maximum borrowing capacity under term loan
Number of financial institutions.
Number Of Financial Institutions
Number of financial institutions
Stock purchase warrants.
Stock Purchase Warrants [Member]
Stock Purchase Warrants
Lease Contractual Term [Domain]
Lease Contractual Term
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
Supplemental schedule of non-cash operating and investing activities
Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]
Undiscounted future non-cancellable lease payments
Loss Contingencies [Table]
Litigation Case [Axis]
Equity impact of the value of stock issued in connection with exercise of warrants during the period.
Issuance Of Common Stock In Connection With Warrant Exercise Value
Issuance of common stock in connection exercise of warrants
Deferred Tax Liabilities, Net
Total deferred tax liabilities
Deferred Tax Liabilities, Net, Total
Accounting Policies [Abstract]
Lessee, Lease, Description [Table]
Lessee Lease Description [Table]
Minimum amount allowed to be prepaid under debt instrument.
Debt Instrument Minimum Prepayment Amount
Minimum amount of prepayment allowed under debt instrument
Represents information pertaining to consultants.
Consultants [Member]
Consultants
Scenario [Axis]
Scenario
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
STOCKHOLDERS' EQUITY
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Other Increases (Decreases) in Period
Common stock, increase in option reserves (in shares)
Common stock, increase in shares reserved for future issuance (in shares)
Earnings Per Share, Basic, Total
Earnings Per Share, Basic
Basic net loss per share
Cash Equivalents, at Carrying Value
Amortized Cost
Expiration date to borrow under a tranche for a debt instrument
Expiry Date Of Tranche
Last date to drawdown any amounts under a tranche.
Summary of Investment Holdings [Table]
Represents the number of months following a change in control when an employee is terminated without cause to be classified as a triggering event for severance payments.
Loss Contingency Triggering Event Employee Termination Without Cause Following Change Of Control Period
Period within which employee is terminated by entity without cause following a change of control
Commitments and Contingencies
Commitments and contingencies
Income Statement [Abstract]
Debt Securities, Available-for-Sale, Current
Marketable securities
Property, Plant and Equipment Disclosure [Text Block]
PROPERTY AND EQUIPMENT
Increase (Decrease) in Deposit Assets
Deposit and other assets
Increase (Decrease) in Deposit Assets, Total
Debt, Current, Total
Debt, Current
Debt
Operating Lease, Cost
Operating lease costs
Severance plan.
Severance Plan [Line Items]
Severance Plan
Increase (Decrease) in Prepaid Expense
Prepaid and other current assets
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number
Stock options fully vested and expected to vest at the end of the period (in shares)
Statistical Measurement [Domain]
Statistical Measurement
Loss Contingencies [Line Items]
Net Cash Provided by (Used in) Operating Activities
Net cash used in operating activities
Minimum percentage of net product revenues maintenance period.
Minimum percentage of net product revenues maintenance period
Minimum percentage of net product revenues maintenance period
Document Period End Date
Document Period End Date
Statistical Measurement [Axis]
Statistical Measurement
Commitments and Contingencies Disclosure [Text Block]
COMMITMENTS AND CONTINGENCIES
Stockholders' Equity Note [Abstract]
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount [Abstract]
Compensation cost related to unvested stock awards not yet recognized
Litigation settlement amount to be paid.
Litigation Settlement Amount to be Paid
Settlement amount to be paid
Earnings Per Share, Diluted, Total
Earnings Per Share, Diluted
Diluted net loss per share
Lease, Cost [Abstract]
Lease Cost
Deferred Tax Assets, Operating Loss Carryforwards
Net operating loss carryforwards
Deferred Tax Assets, Operating Loss Carryforwards, Total
Unrecognized Tax Benefits
Balance at the end of the period
Balance at the beginning of the period
Debt Instrument, Name [Domain]
Debt Instrument, Name
Represents information pertaining to the 2006 Directors Plan.
Directors Plan2006 [Member]
2006 Directors Plan
Fair Value Hierarchy and NAV [Domain]
Fair Value Hierarchy and NAV
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number
Stock options exercisable at the end of the period (in shares)
Operating Loss Carryforwards [Line Items]
Operating Loss Carryforwards [Line Items]
Loss Contingency, Nature [Domain]
Long-Term Debt, Description
Description of maturity date terms for term loan
Fair Value, Recurring [Member]
Recurring basis
Additional Paid in Capital, Common Stock
Additional paid-in capital
Represents the duration of the purchase period under the employee stock purchase plan.
Share Based Compensation Arrangement By Share Based Payment Award Duration Of Purchase Period
Duration of the purchase period
Schedule of Maturities of Long-Term Debt [Table Text Block]
Future Minimum Payments Under Term Loan Facility
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Number of Shares - Options Outstanding
2020 Pre-funded warrants.
Two Thousand Twenty Pre Funded Warrants [Member]
2020 Pre-Funded Warrant
Deferred Tax Assets, Net
Total net deferred tax assets
Percentage of prepayment amount to be paid upon prepayment under debt instrument.
Percentage Of Prepayment Charge
Prepayment charge (as a percentage)
Underwritten Public Offering [Member]
Underwritten Public Offering [Member]
Underwritten Public Offering
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period
Stock options exercised (in shares)
Consolidation, Policy [Policy Text Block]
Principles of Consolidation
Effective Income Tax Rate Reconciliation, Other Adjustments, Percent
Other
Deferred tax assets operating lease liabilities.
Deferred Tax Assets Operating Lease Liabilities
Operating lease liabilities
Liabilities and Equity [Abstract]
LIABILITIES AND STOCKHOLDERS' EQUITY
Cost method investments cost basis.
Cost Method Investments Cost Basis
Cost method investments cost basis
CARES act impact.
C A R E S Act Impact [Abstract]
Entity Address, Postal Zip Code
Entity Address, Postal Zip Code
Entity Interactive Data Current
Entity Interactive Data Current
Debentures, bonds and other debt securities issued by US government sponsored entities (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Excludes debt issued by the Government National Mortgage Association (GNMA or Ginnie Mae) due in 1 to 2 years.
Government Sponsored Enterprise Securities Due In One To Two Years [Member]
Government-sponsored enterprise securities (due in one to two years)
Represents the minimum percentage of ownership required for granting of options at a price not less than 110 percent of the fair market value of common stock.
Share Based Compensation Arrangement By Share Based Payment Award Minimum Percentage Of Ownership Required For Granting Options At Minimum110 Percent Of Fair Market Value
Minimum percentage of ownership required for granting stock options at least 110% of fair market value of common stock
Unrecognized Tax Benefits that Would Impact Effective Tax Rate
Unrecognized tax benefits, if recognized would impact effective tax rate
Increase (Decrease) in Accounts Payable
Accounts payable
Increase (Decrease) in Accounts Payable, Total
Credit Facility [Domain]
Credit Facility
Increase (Decrease) in Employee Related Liabilities
Accrued compensation and benefits
Increase (Decrease) in Employee Related Liabilities, Total
Debt Securities, Available-for-Sale, Unrealized Loss Position, Fair Value [Table Text Block]
Schedule of cash equivalents and marketable securities with unrealized losses
Lessee, Operating Lease, Liability, Undiscounted Excess Amount
Less: imputed interest
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period
Awards granted (in shares)
Entity Well-known Seasoned Issuer
Entity Well-known Seasoned Issuer
Municipal Bonds [Member]
Municipal securities
Debt Instrument, Payment Terms
Description of term loan payment terms
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price
Stock options exercised (in dollars per share)
Entity Incorporation, State or Country Code
Entity Incorporation, State or Country Code
Equity Components [Axis]
Equity Components
Number of warrants exercised during the period
Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights Exercised
Warrants to purchase common stock exercised, shares
Represents the percentage of costs that the company must pay after the termination of the Collaboration Agreement.
Collaborative Arrangement After Termination Cost Sharing Percentage Of Entity
Percentage of costs to be paid by Geron after termination of Collaboration Agreement
Depreciation [Abstract]
Depreciation [Abstract]
Public Offering of Common Stock and Warrants [Member]
Public Offering Of Common Stock And Warrants [Member]
Public Offering of Common Stock and Warrants
Local Phone Number
Local Phone Number
Property, Plant and Equipment [Line Items]
Property Plant And Equipment [Line Items]
Sale of Stock [Axis]
Sale of Stock
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price
Stock options exercisable at the end of the period (in dollars per share)
Effective income tax Rate reconciliation net operating loss not benefitted.
Effective Income Tax Rate Reconciliation Net Operating Loss Not Benefitted
Net operating loss not benefitted
Statement of Cash Flows [Abstract]
Tranche four.
Tranche Four [Member]
Represents the number of agreed upon studies.
Collaborative Arrangement Number Of Studies
Number of agreed upon studies
Income Tax Authority [Domain]
Income Tax Authority
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Accumulated Other Comprehensive Income (Loss), Net of Tax
Accumulated Other Comprehensive Income (Loss), Net of Tax, Total
Accumulated other comprehensive loss
Document Annual Report
Document Annual Report
2018 equity incentive plan.
Two Thousand And Eighteen Equity Incentive Plan [Member]
2018 Plan
Common Stock, Par or Stated Value Per Share
Common stock, par value (in dollars per share)
Represents the maximum duration of the offering period under the employee stock purchase plan.
Share Based Compensation Arrangement By Share Based Payment Award Maximum Duration Of Offering Period
Maximum duration of offering period
The amount of the settlement to be paid by the company in either cash or shares, at the company's election.
Litigation Settlement Amount Paid in Cash or Kind
Settlement to be paid in cash or shares as elected by company
Stated interest rate
Debt Instrument, Interest Rate, Stated Percentage
Minimum interest rate (as a percentage)
Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition
Period for recognition of compensation cost on weighted average basis
Long-Lived Tangible Asset [Axis]
Long-Lived Tangible Asset
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term
Stock options fully vested and expected to vest at the end of the period
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Shares Authorized
Shares of common stock authorized for issuance
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Collaborative Arrangement Disclosure [Text Block]
LICENSE AGREEMENT
Maximum [Member]
Maximum
Maximum
Carrying value of amounts transferred to third parties for security purposes that are expected to be returned or applied towards payment after one year or beyond the operating cycle, if longer; and amount of noncurrent assets classified as other.
Deposits And Other Assets Noncurrent
Deposits and other assets
Interest Payable
Less: amount representing interest
Share-Based Payment Arrangement, Additional Disclosure [Abstract]
Additional disclosures
Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block]
Schedule of reconciliation of the beginning and ending amounts of unrecognized tax benefits
Fair Value, Inputs, Level 3 [Member]
Level 3
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition
Stock-based compensation for equity-based awards to employees and directors
APIC, Share-Based Payment Arrangement, Increase for Cost Recognition, Total
Clinical supply agreement.
Clinical Supply Agreement [Member]
Clinical Supply Agreement
Fair Value, Recurring and Nonrecurring [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Net increase (decrease) in cash, cash equivalents and restricted cash
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect
Payables and Accruals [Abstract]
2023 Sales Agreement
At Market Issuance Two Thousand And Twenty Three Sales Agreement [Member]
At market issuance two thousand and twenty three sales agreement.
The increase (decrease) during the reporting period for amount due to counterparty.
Increase Decrease Due To Counterparty
Amount due to Janssen Biotech, Inc.
Purchase warrants.
Purchase Warrants [Member]
Purchase Warrants [Member]
General and Administrative Expense [Member]
General and administrative
Percentage of remaining term commitments held under loan agreement.
Percentage of Remaining Term Commitments Held Under Loan Agreement
Percentage of remaining term commitments held under loan agreement
Issuance of common stock, pre-funded warrant and warrants to purchase common stock in public offering, net of issuance costs
Public Offering Stock Issued During Period Value New Issue
Public offering stock issued during period value new issues.
Document Financial Statement Error Correction [Flag]
Fair Value, by Balance Sheet Grouping [Table Text Block]
Schedule of cash equivalents, restricted cash and marketable securities by security type
City Area Code
City Area Code
Net Cash Provided by (Used in) Operating Activities [Abstract]
Cash flows from operating activities:
Debt Covenant Minimum Cash Balance
Debt Covenant Minimum Cash Balance
Debt covenant minimum cash balance
Proceeds from Issuance of Long-Term Debt
Proceeds from debt financing, net of paid debt issuance costs and debt discounts
Proceeds from Issuance of Long-Term Debt, Total
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment
Less accumulated depreciation and amortization
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Total
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Beginning Balance
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment, Ending Balance
General and Administrative Expense
General and administrative
General and Administrative Expense, Total
General and administrative expense
Period of base salary in connection with a non-change of control to be considered for severance payments
Loss Contingency Period Of Current Base Salary To Be Paid Under Severance Plan Non Change of Control Triggering Event
Loss contingency period of current base salary to be paid under severance plan non change of control triggering event.
Weighted Average Number of Shares Outstanding, Basic, Total
Weighted Average Number of Shares Outstanding, Basic
Shares used in computing basic net loss per share
Schedule of Share-Based Payment Award, Employee Stock Purchase Plan, Valuation Assumptions [Table Text Block]
Schedule of assumptions used to estimate the fair value of employee stock purchases under the purchase plan
Employee Stock [Member]
Employee stock purchase
Net Cash Provided by (Used in) Financing Activities [Abstract]
Cash flows from financing activities:
Research and Development Expense, Policy [Policy Text Block]
Research and Development Expenses
Accrued end of term charges.
Accrued End Of Term Charges
Accrued end of term charge
Statement [Table]
Statement [Table]
Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]
Schedule of assumptions used to estimate the fair value of stock options granted
Document Fiscal Period Focus
Document Fiscal Period Focus
Lessee, Operating Lease, Liability, to be Paid
Total lease payments
Severance plan.
Severance Plan [Table]
Severance Plan [Table]
This category includes information about short-term debt securities that are issued by either a domestic or foreign corporate business entity with a date certain promise of repayment and a return to the holder for the time value of money (for example, variable or fixed interest), due in less than one year.
Corporate Note Securities Due In Less Than One Year [Member]
Corporate notes (due in less than one year)
Tax Credit Carryforward [Line Items]
Tax Credit Carryforward [Line Items]
2025
Lessee, Operating Lease, Liability, to be Paid, Year Two
Restricted Cash and Investments [Abstract]
Restricted cash:
Accrued Professional Fees, Current
Professional legal and accounting fees
Research and Development Expense (Excluding Acquired in Process Cost)
Research and development
Statement [Line Items]
Statement [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount
Potential dilutive securities excluded from diluted earnings (loss) per share calculation (in shares)
Lease, Cost
Total lease costs
Subsequent Event [Line Items]
Asset Class [Domain]
Asset Class
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]
Schedule of significant components of the entity's deferred tax assets
Common Stock [Member]
Common Stock
At market issuance two thousand and twenty sales agreement.
At Market Issuance Two Thousand And Twenty Sales Agreement [Member]
2020 Sales Agreement
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract]
Adjustments to reconcile net loss to net cash used in operating activities:
Warrants expiration date
Warrants and Rights Outstanding, Maturity Date
Second amendment.
Second Amendment [Member]
Second Amendment [Member]
Cash and Cash Equivalents, at Carrying Value
Cash and cash equivalents
Cash and Cash Equivalents, at Carrying Value, Total
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block]
Summary of allocation of stock-based compensation expense related to share-based payment awards
Realized Investment Gains (Losses)
Realized investment gains (losses)
Realized Investment Gains (Losses), Total
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value
Stock options exercisable at the end of the period (in dollars)
Accretion (Amortization) of Discounts and Premiums, Investments
Accretion and amortization on investments, net
Entity Common Stock, Shares Outstanding
Entity Common Stock, Shares Outstanding
Proceeds from Sale of Debt Securities, Available-for-Sale
Proceeds from sales of securities available for sale
Fair Value of Financial Instruments, Policy [Policy Text Block]
Fair Value of Financial Instruments
Antidilutive Securities, Name [Domain]
Antidilutive Securities, Name
Represents the number of options to be granted to purchase shares upon appointment to Board of Directors.
Share Based Compensation Arrangement By Share Based Payment Award Options To Be Granted To Purchase Shares Upon Appointment
Stock options to be granted to purchase shares upon appointment (shares)
Debt Instrument, Unused Borrowing Capacity, Amount
Available remaining loan principal under second amendment
Information by type of sale of the entity's stock. = 2022 Underwritten Public Offering [Member].
Two Thousand Twenty Two Underwritten Public Offering [Member]
2022 Underwritten Public Offering
Foster City office space lease.
Foster City Office Space Lease [Member]
Foster City Office Space Lease
Investment Owned, Balance, Shares
Number of shares owned
Cover
Cover [Abstract]
Interest only period payment term description.
Interest Only Period Payment Term Description
Interest only period payment term description
Vesting [Axis]
Document Fiscal Year Focus
Document Fiscal Year Focus
Two thousand twenty purchase warrants.
Two Thousand Twenty Purchase Warrants [Member]
2020 Purchase Warrants
Payments for Legal Settlements
Settlement to be paid by insurers
Represents the period following change of control within which an employee is not offered comparable employment (new or continuing) by the entity or its successor or acquired and to be considered as triggering event for severance payments.
Loss Contingency Triggering Event Period Following Change Of Control During Which No Comparable Employment Is Offered By Entity
Period within which no comparable employment is offered by the entity following a change of control
Litigation Settlement Amount, Interest and other receivable Recognized
Litigation Settlement Amount, Interest and other receivable Recognized
Settlement amount, Interest and other receivable recognized
Sale of Stock [Domain]
Sale of Stock
Interest Payable, Current
Interest payable
Gain (Loss) on Disposition of Other Assets
Net gain on exchange and sales of equity investment
Share-Based Payment Arrangement [Policy Text Block]
Stock-Based Compensation
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value
Weighted average estimated fair value of other than employee stock options granted (in dollars per share)
Weighted average grant date fair value (in dollars per share)
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised
Proceeds from issuances of common stock from equity plans
Proceeds, Issuance of Shares, Share-Based Payment Arrangement, Including Option Exercised, Total
Security Exchange Name
Security Exchange Name
Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period
Expiration term of stock options from date of grant
Maximum amount of annual salary that can be withheld to purchase shares
Share Based Compensation Arrangement By Share Based Payment Award Maximum Amount Of Annual Salary That Can Be Withheld Per Year
Share based compensation arrangement by share based payment award maximum amount of annual salary that can be withheld per year.
Domestic Tax Authority [Member]
Federal
New Accounting Pronouncements, Policy [Policy Text Block]
Recent Accounting Pronouncements
Preferred Stock, Shares Issued
Preferred stock, shares issued
Preferred Stock, Shares Authorized
Preferred stock, shares authorized
Minimum cash covenant required upon achievement of certain regulatory milestones.
Debt Covenant Min Cash Upon Regulatory Milestone
Debt covenant minimum cash balance upon regulatory milestone achievement
Property, Plant and Equipment, Gross
Property and equipment, gross
Property, Plant and Equipment, Gross, Total
Property, Plant and Equipment, Gross, Beginning Balance
Property, Plant and Equipment, Gross, Ending Balance
Carrying value as of the balance sheet of obligations incurred through the date and payable for manufacturing related costs. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
Accrued Manufacturing Activities Current
Manufacturing activities
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability
Operating lease assets obtained in exchange for operating lease liabilities
Share-Based Goods and Nonemployee Services Transaction [Line Items]
Stock-Based Compensation to Service Providers
Carrying amount as of the balance sheet date of employer taxes paid to tax authorities representing refunds based on calculated eligible credits. Also called employer tax refund receivable.
Employer Tax Receivable
Employee retention credit, CARES Act
Deferred tax liabilities operating leases right of use assets.
Deferred Tax Liabilities Operating Leases Right Of Use Assets
Operating leases, right-of-use assets
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price
Stock options cancelled/forfeited/expired (in dollars per share)
Financial Instrument [Axis]
Financial Instrument
Tranche Six [Member]
Tranche six.
Option one min cash debt covenant.
Option one min cash debt covenant [Member]
Class of Warrant or Right [Table]
Facility charge
Facility Costs
Entity Emerging Growth Company
Entity Emerging Growth Company
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value
Total pretax intrinsic value of stock options exercised (in dollars)
Amendment Flag
Amendment Flag
Tax Credit Carryforward, Amount
Tax credit carryforwards
Employees Above The Vice President Level
Employees Above The Vice President Level [Member]
Employees above the vice president level.
Represents information pertaining to the 2011 Incentive Award Plan.
Incentive Award Plan2011 [Member]
2011 Plan
Schedule of Accrued Liabilities [Table Text Block]
Schedule of accrued liabilities
Restricted cash and cash equivalents gross unrealized losses.
Restricted Cash And Cash Equivalents Gross Unrealized Losses
Gross Unrealized Losses
Debt Securities, Available-for-Sale, Accumulated Gross Unrealized Loss, before Tax
Gross Unrealized Losses
Tranche Five [Member]
Tranche five.
Supplier [Axis]
Supplier
Performance based stock options.
Performance Based Stock Options [Member]
Performance-Based Stock Options
Hercules.
Hercules [Member]
Leases [Abstract]
Debt Securities, Available-for-Sale, Unrealized Loss Position
Total - Estimated Fair Value
Entity File Number
Entity File Number
Collaborative Arrangement and Arrangement Other than Collaborative [Line Items]
Collaborative Arrangements And Noncollaborative Arrangement Transactions [Line Items]
Net operating loss carryforwards, expire beginning 2024 through 2037
Operating loss carryforwards subject to expiration.
Operating Loss Carryforwards Subject To Expiration
Deferred Tax Assets, Gross
Total deferred tax assets
Long-Term Debt, Excluding Current Maturities
Noncurrent debt
Noncurrent portion of debt
OCI, Debt Securities, Available-for-Sale, Unrealized Holding Gain (Loss), before Adjustment, after Tax
Net unrealized loss on marketable securities
Other comprehensive loss
At market issuance, 2018 sales agreement.
At Market Issuance Two Thousand And Eighteen Sales Agreement [Member]
2018 Sales Agreement
Accounts Payable, Current
Accounts payable
Accounts Payable, Current, Total
Debt Instrument [Axis]
Debt Instrument
Debt Instrument, Interest Rate, Basis for Effective Rate
Term loan interest rate description
Deferred Tax Assets, Valuation Allowance
Less: valuation allowance
Operating Expenses
Total operating expenses
Litigation settlement amount, General and administrative expense recognized.
Litigation settlement amount, General and administrative expense recognized
Settlement amount, General and administrative expense recognized
2024
Long-Term Debt, Maturity, Year One
Restricted Investments, at Fair Value
Estimated Fair Value
Auditor Location
Auditor Location
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term
Expected term range
Debt Securities, Available-for-Sale, Noncurrent
Noncurrent marketable securities
Entity Address, Address Line Two
Entity Address, Address Line Two
Preferred stock, $0.001 par value; 3,000,000 shares authorized; no shares issued and outstanding at December 31, 2023 and 2022
Preferred Stock, Value, Issued
Entity Small Business
Entity Small Business
Entity Shell Company
Entity Shell Company
Loss Contingency, Settlement Agreement, Date
Settlement agreement date
Title of Individual [Axis]
Investment Type [Axis]
Investment Type
Nontrade Receivables, Current
Interest and other receivables
Nontrade Receivables, Current, Total
Class of Warrant or Right, Exercise Price of Warrants or Rights
Warrants exercise price
Warrants to purchase common stock, exercise price
Represents the gross unrealized gains for cash and cash equivalents.
Cash And Cash Equivalents Unrealized Gains
Gross Unrealized Gains
Certificates of Deposit [Member]
Certificate of deposit
Revenues [Abstract]
Revenues:
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period
Stock options cancelled/forfeited/expired (in shares)
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Total
Commercial Paper [Member]
Commercial paper
Entity Address, Address Line One
Entity Address, Address Line One
Cash and Cash Equivalents, Fair Value Disclosure
Estimated Fair Value
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Stock-Based Compensation Expense
Antidilutive Securities [Axis]
Antidilutive Securities
Debt instrument unamortized end of term charge.
Debt Instrument Unamortized End Of Term Charge
Less: unamortized end of term charge
Restricted cash and cash equivalents unrealized gains.
Restricted Cash And Cash Equivalents Unrealized Gains
Gross Unrealized Gains
Represents the aggregate number of share instruments issued under a share-based compensation plan.
Share Based Compensation Arrangement By Share Based Payment Award Aggregate Shares Issued Under Plan
Aggregate shares issued under plan
Subsequent Event Type [Domain]
Subsequent Event Type
Adjustments to Additional Paid in Capital, Stock Issued, Issuance Costs
Issuance costs
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Minimum
Risk-free interest rate range, minimum (as a percent)
Income Statement Location [Axis]
Income Statement Location
Two Thousand Twenty Stock Purchase Warrants [Member]
Two Thousand Twenty Stock Purchase Warrants [Member]
2020 Stock Purchase Warrant
Variable Lease, Cost
Variable lease costs
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate, Maximum
Risk-free interest rate range, maximum (as a percent)
Represents the period within which employee resigns following a change of control due to material change in terms of employment and to be considered as triggering event for severance payments.
Loss Contingency Triggering Event Period Following Change Of Control Within Which Employee Resigns Due To Material Change In Terms Of Employment
Period within which employee resigns following a change of control due to material change in terms of employment
Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate
Dividend yield (as a percent)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest
Net loss
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest, Total
Tranche two.
Tranche Two [Member]
2028
Lessee, Operating Lease, Liability, to be Paid, Year Five
Derivative stipulation.
Derivative Stipulation [Member]
Derivative Stipulation
Stockholders' Equity, Policy [Policy Text Block]
Accumulated Other Comprehensive Gain (Loss)
Fair Value, Inputs, Level 2 [Member]
Level 2
Share Price
Closing stock price (in dollars per share)
Collaborative Arrangement and Arrangement Other than Collaborative [Table]
Schedule Of Collaborative Arrangements And Noncollaborative Arrangement Transactions [Table]
Long-Term Debt, Gross
Principal amount outstanding under term loan
Title of 12(b) Security
Title of 12(b) Security
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture
Issuances of common stock under equity plans
Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture, Total
Tranche C [Member]
Tranche C [Member]
Tranche C [Member]
Equity Securities [Member]
Equity investment
Debt instrument face amount expired
Debt Instrument Face Amount Expired
Debt instrument face amount expired.
Litigation Settlement Amount Outstanding
Litigation Settlement Amount Outstanding
Litigation settlement amount outstanding
Increase (Decrease) in Equity Securities, FV-NI
Increase (decrease) in fair value of equity investment
Lease Contractual Term [Axis]
Lease Contractual Term
Investments [Domain]
Investments
Assets, Fair Value Adjustment
Change in fair value of equity investment, including foreign currency translation
Represents the maximum percentage of annual salary that an employee can choose to have withheld to purchase common stock under the purchase plan.
Share Based Compensation Arrangement By Share Based Payment Award Maximum Percentage Of Annual Salary That Can Be Withheld
Maximum percentage of annual salary that can be withheld
Net Cash Provided by (Used in) Investing Activities [Abstract]
Cash flows from investing activities:
Tranche three.
Tranche Three [Member]
State and Local Jurisdiction [Member]
State
Option three min cash debt covenant.
Option three min cash debt covenant [Member]
Litigation settlement amount, Accrued liabilities recognized
Litigation settlement amount, Accrued liabilities recognized
Settlement amount, Accrued liabilities recognized
Segment Reporting, Policy [Policy Text Block]
Segment Information
Long-Lived Tangible Asset [Domain]
Long-Lived Tangible Asset
Subsequent Event [Table]
Insurance Claims [Member]
Insurance Claims
US Treasury Securities Due In less than one Year Member.
U S Treasury Securities Due In Less Than One Year [Member]
U.S. Treasury securities (due in less than one year)
Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]
Restricted Cash
Tax Credit Carryforward [Table]
Tax Credit Carryforward [Table]
2023 Pre-funded Warrant
Two Thousand Twenty Three Pre Funded Warrant Member
Two thousand twenty three pre funded warrant.
2023 Public Offering
2023 Underwritten Public Offering.
Two Thousand Twenty Three Underwritten Public Offering [Member]
2023 Underwritten Public Offering
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss
Total - Gross Unrealized Losses
Debt Securities, Available-for-Sale, Unrealized Loss Position, Accumulated Loss, Total
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term
Stock options exercisable at the end of the period
Common Stock, Shares, Outstanding
Balances (in shares)
Balances (in shares)
Common stock, shares outstanding
Represents information pertaining to debentures, bonds and other debt securities issued by US government sponsored entities (GSEs), for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB). Excludes debt issued by the Government National Mortgage Association (GNMA or Ginnie Mae), due in one to two years.
U S Government Sponsored Enterprises Debt Securities Due In One To Two Years [Member]
Government-sponsored enterprise securities (due in one to two years)
Employee Retention Credit, Outstanding
Employee Retention Credit Amount Outstanding Receivables
Employee retention credit amount outstanding receivables.
Supplemental Cash Flow Elements [Abstract]
Proceeds from Warrant Exercises
Proceeds from exercise of warrants
Former collaborative arrangement.
Former Collaborative Arrangement [Member]
Former Collaboration Agreement
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized tax benefits
Reclassification between prepaid and other current assets and deposits and other assets.
Reclassification Between Prepaid And Other Current Assets And Deposits And Other Assets
Reclassification between prepaid and other current assets and deposits and other assets
Unamortized Debt Issuance Expense
Unamortized debt discount and issuance costs
Lessee, Operating Lease, Discount Rate
Operating Lease, Percentage of Discount Rate
Income Statement Location [Domain]
Income Statement Location
Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price
Stock options granted (in dollars per share)
Restricted Cash and Cash Equivalents, Current
Restricted cash
Amortized Cost
Document Type
Document Type
Document Type
Trading arrangement expiration date.
Expiration Date
Trd Arr Expiration Date
Net Cash Provided by (Used in) Investing Activities
Net cash provided by (used in) investing activities
Share-Based Payment Arrangement [Member]
Stock options and warrants excluded from diluted net loss per share calculation due to net loss position
Employee Stock Purchase Plan
Counterparty Name [Domain]
Counterparty Name
Lessee, Operating Lease, Option to Terminate
Operating lease term, option to terminate lease
Proceeds from public offering issuance of common stock and warrants.
Proceeds From Public Offering Issuance Of Common Stock And Warrants
Proceeds from issuance of common stock and warrants in public offering, net of paid issuance costs
Net Cash Provided by (Used in) Financing Activities
Net cash provided by financing activities
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized
Additional shares authorized (in shares)
Entity Filer Category
Entity Filer Category
Represents the percentage of costs that Janssen must pay during certain phases of the agreement.
Collaborative Arrangement Cost Sharing Percentage Of Counterparty
Percentage of costs to be paid by Janssen
Share based compensation arrangement by share based payment award minimum exercise price of options granted to employees with more than 10 percentage of common stock.
Share Based Compensation Arrangement By Share Based Payment Award Minimum Exercise Price Of Options Granted To Employees With More Than10 Percentage Of Common Stock
Minimum exercise price as a percentage of fair market value for employees having more than 10 % outstanding common stock
Percentage of outstanding loan amount payable upon maturity.
Debt Instrument End Of Term Charge Percentage
End of term charge for loan, percentage
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Total
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax
Foreign currency translation adjustment
Payments to Acquire Marketable Securities
Purchases of marketable securities
Asset Class [Axis]
Asset Class
Public offering stock issued during period shares new issues.
Public Offering Stock Issued During Period Shares New Issues
Issuance of common stock, pre-funded warrant and warrants to purchase common stock in public offering, net of issuance costs (in shares)
Amount of increase (decrease) from effect of unrealized losses and exchange rate changes on cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage; held in foreign currencies; including, but not limited to, disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.
Effect Of Unrealized Losses And Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
Net effect of unrealized gains and exchange rates on cash, cash equivalents and restricted cash
Liabilities
Total liabilities
Property, Plant and Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Line of Credit Facility, Borrowing Capacity, Description
Expiration date to borrow under a tranche for a debt instrument, description
Loss contingency period of current base salary to be paid under severance plan.
Loss Contingency Period Of Current Base Salary To Be Paid Under Severance Plan
Period of base salary to be considered for severance payments
Equity, Attributable to Parent
Balances
Balances
Total stockholders' equity
Represents information pertaining to the stock options to be granted by the entity subsequent to the grant upon first appointment to the Board of Directors.
Subsequent Director Option [Member]
Subsequent Director Option
Documents Incorporated by Reference [Text Block]
Documents Incorporated by Reference
2022 Stock Purchase Warrants.
Two Thousand Twenty Two Stock Purchase Warrants [Member]
2022 Stock Purchase Warrants
Net loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Increase (Decrease) in Stockholders' Equity
Interest Expense
Interest expense
Interest Expense, Total
This category includes information about short-term debt securities that are issued by either a domestic or foreign corporate business entity with a date certain promise of repayment and a return to the holder for the time value of money (for example, variable or fixed interest), due in one to two years.
Corporate Note Securities Due In One To Two Years [Member]
Corporate notes (due in one to two years)
New Jersey lease and Foster city lease member.
New Jersey Lease And Foster City Lease [Member]
New Jersey Lease And Foster City Lease
Depreciation, Depletion, and Amortization [Policy Text Block]
Depreciation and Amortization
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Percent
State income tax, net of federal benefit
Statement of Financial Position [Abstract]
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture
Issuances of common stock under equity plans (in shares)
Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total
Weighted Average Number of Shares Outstanding, Diluted, Total
Weighted Average Number of Shares Outstanding, Diluted
Shares used in computing diluted net loss per share
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]
Schedule reconciles the federal statutory tax rate to the effective income tax rate from continuing operations
Credit Facility [Axis]
Credit Facility
Operating Lease, Right-of-Use Asset, Periodic Reduction
Amortization of right-of-use assets
Public offering price of common stock per share
Shares Issued, Price Per Share
Combined public offering price per share of common stock and accompanying stock purchase warrants
Effective Income Tax Rate Reconciliation, Percent
Effective tax rate
Proceeds from Sale of Other Assets, Investing Activities
Proceeds from sales of equity investment
Reverse stock split ratio for equity investment.
Equity Investment Reverse Stock Split
Equity investment reverse stock split
Schedule of Share-Based Goods and Nonemployee Services Transaction [Table]
Schedule Of Share Based Goods And Nonemployee Services Transaction [Table]
Debt Securities, Available-for-Sale, Amortized Cost
Amortized Cost
Operating Lease, Weighted Average Remaining Lease Term
Operating lease,remaining lease term
Share-Based Compensation Arrangement by Share-Based Payment Award, Purchase Price of Common Stock, Percent
Percentage applied to common stock market value in calculating purchase price under purchase plan
Use of Estimates, Policy [Policy Text Block]
Use of Estimates
Income Tax Disclosure [Text Block]
INCOME TAXES
Stock Issued During Period, Value, Issued for Services
Stock-based compensation related to issuance of common stock and options in exchange for services
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price
Balance at the end of the period (in dollars per share)
Balance at the beginning of the period (in dollars per share)
Total number of shares from equity investment that have been sold during the period.
Number Of Shares Sold From Equity Investment
Number Of Shares Sold From Equity Investment
Corporate Note Securities [Member]
Corporate notes
Leasehold Improvements [Member]
Leasehold improvements
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss
12 Months or Greater - Gross Unrealized Losses
Income Tax Authority [Axis]
Income Tax Authority
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share
Pre Funded Warrants Purchase [Member]
Pre-Funded Warrants
Pre-funded warrants purchase.
Fair Value Disclosures [Abstract]
Fair Value Hierarchy and NAV [Axis]
Fair Value Hierarchy and NAV
Represents information pertaining to the stock options to be granted by the entity to a person who first becomes a non-employee director.
First Director Option [Member]
First Director Option
Measurement Frequency [Domain]
Measurement Frequency
Payments to Acquire Property, Plant, and Equipment
Purchases of property and equipment
Payments to Acquire Property, Plant, and Equipment, Total
Class action stipulation.
Class Action Stipulation [Member]
Class Action Stipulation
Stock Issued During Period, Shares, New Issues
Issuance of common stock in connection with at market offering, net of issuance costs (in shares)
Employee-related Liabilities, Current
Accrued compensation and benefits
Employee-related Liabilities, Current, Total
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations
Cash, cash equivalents and restricted cash at the end of the period
Cash, cash equivalents and restricted cash at the beginning of the period
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Including Disposal Group and Discontinued Operations, Total
Income Tax Disclosure [Abstract]
Aggregate Intrinsic Value
Share Based Compensation Arrangement By Share Based Payment Award Options Intrinsic Value [Abstract]
Aggregate Intrinsic Value - Options Outstanding
Business Combination, Consideration Transferred, Equity Interests Issued and Issuable Fair Value Method
Business Combination Cost Of Acquired Entity Equity Interests Issued And Issuable Fair Value Method
Net operating loss carryforwards, expire beginning 2028 through 2041
Operating Loss Carryforwards
Net operating loss carryforwards