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Options, Forfeited (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Prepaid and other current assets Prepaid Expense and Other Assets, Current Accounting & tax consulting liabilities Accrued Grant Funding Accrued Grant Funding Options, Outstanding, Aggregate Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Lisata transaction costs Asset Acquisition, Consideration Transferred, Transaction Cost Share-based compensation (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Registrant Name Entity Registrant Name Other assets Increase (Decrease) in Other Operating Assets Warrants, Vested and expected to vest, Aggregate Intrinsic Value Aggregate Intrinsic Value, Warrants vested and expected to vest Aggregate Intrinsic Value, Warrants vested and expected to vest Warrants, 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Equipment Total share-based compensation expense Share-Based Payment Arrangement, Expense Benefit from income taxes Income Tax Expense (Benefit) Warrants, Vested, Aggregate Intrinsic Value Aggregate Intrinsic Value, Warrants vested Aggregate Intrinsic Value, Warrants vested Asset Acquisition [Abstract] Income Tax Authority [Domain] Income Tax Authority [Domain] Salaries, employee benefits and related taxes Employee-related Liabilities, Current Fair Value Measurements Fair Value Disclosures [Text Block] Acquired in-process research and development Asset Acquisition, Acquired In-Process Research And Development Asset Acquisition, Acquired In-Process Research And Development Net proceeds from issuances of common stock Stock Issued During Period, Value, New Issues Equity [Abstract] Equity [Abstract] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Weighted average remaining lease term for operating leases (in years) Operating Lease, Weighted Average Remaining Lease Term Entity [Domain] Entity [Domain] Amendment Flag Amendment Flag Legal Entity [Axis] Legal Entity [Axis] Money market funds Money Market Funds [Member] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Weighted average discount rate for operating leases (percent) Operating Lease, Weighted Average Discount Rate, Percent Property, Plant and Equipment, Useful Life Property, Plant and Equipment, Useful Life Leasehold Improvements Leasehold Improvements [Member] Diluted shares Weighted Average Number of Shares Outstanding, Diluted Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Operating Expenses: Operating Expenses [Abstract] Purchase of property and equipment Payments to Acquire Property, Plant, and Equipment Additional Paid-in Capital Additional Paid-in Capital [Member] Cash and cash equivalents Asset Acquisition, Cash and Cash Equivalents Asset Acquisition, Cash and Cash Equivalents Options, Expired (in dollars per share) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Total assets Assets Proceeds From Sale of NOLS Proceeds From Sale of NOLS Proceeds From Sale of NOLS Australia Research and Development Tax Incentive Research and Development Tax Incentive [Text Block] Research and Development Tax Incentive Cover [Abstract] Cover [Abstract] Subsequent Events Subsequent Events [Text Block] Recurring Fair Value, Recurring [Member] Other long-term liabilities Other Liabilities, Noncurrent Total lease payments Lessee, Operating Lease, Liability, to be Paid Operating Lease Liabilities: Operating Lease, Liability [Abstract] Total purchase price Asset Acquisition, Consideration Transferred Total operating expenses Operating Expenses Net (decrease) increase in cash and cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Cash flows from financing activities: Net Cash Provided by (Used in) Financing Activities [Abstract] Equity Component [Domain] Equity Component [Domain] Marketable securities Marketable Securities State State and Local Jurisdiction [Member] Basic shares Weighted Average Number of Shares Outstanding, Basic Entity Current Reporting Status Entity Current Reporting Status Bonds Bonds [Member] Operating loss Operating Income (Loss) Qilu Qilu [Member] Qilu Schedule of Operating Lease Liabilities and Right-of-Use Assets on Balance Sheet Lessee, Operating Lease, Balance Sheet Presentation [Table Text Block] Lessee, Operating Lease, Balance Sheet Presentation [Table Text Block] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Collaborative Arrangement and Arrangement Other than Collaborative [Line Items] Statement [Line Items] Statement [Line Items] Options, Vested and expected to vest (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Stock Options, Weighted Average Contractual Term and Intrinsic Value Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Amortized Cost Debt Securities, Available-for-Sale, Amortized Cost, Fiscal Year Maturity [Abstract] Stock Repurchase Program, Number of Shares Authorized to be Repurchased Stock Repurchase Program, Number of Shares Authorized to be Repurchased Non- Controlling Interest in Subsidiary Noncontrolling Interest [Member]