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value, ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value Contingent consideration - Keystone acquisition Business Combination, Contingent Consideration, Liability, Noncurrent Arrangement Duration Trading Arrangement Duration Other Other Sundry Liabilities, Noncurrent Purchase price (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Segments [Axis] Segments [Axis] Prepaid expenses and other current assets Increase (Decrease) in Prepaid Expense and Other Assets Warrant liabilities Warrant Liabilities, Fair Value Disclosure Warrant Liabilities, Fair Value Disclosure Exercise Price Award Exercise Price Fair Value by Liability Class [Domain] Fair Value by Liability Class [Domain] Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Share price (in 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value Assets, Fair Value Disclosure Summary of Change in Fair Value of Warrant Liabilities and Level 3 Assets and Liabilities Fair Value Measurement Inputs and Valuation Techniques [Table Text Block] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Number of operating segments Number of Operating Segments Accretion of interest income on held-to-maturity securities Accretion (Amortization) of Discounts and Premiums, Investments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Weighted Average Remaining Life (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return 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receivable Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Transplant Clinical Transplant Clinical [Member] Transplant Clinical Customer [Axis] Customer [Axis] Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating loss from continuing operations Operating loss from continuing operations Operating Income (Loss) Line of Credit Line of Credit [Member] Accumulated deficit Retained Earnings (Accumulated Deficit) Leasehold improvements Leaseholds and Leasehold Improvements [Member] Supplier Concentration Risk Supplier Concentration Risk [Member] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Equity Consideration in Escrow and Contingent Consideration - 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Block] Debt Conversion [Table] Debt Conversion [Table] Asset Class [Domain] Asset Class [Domain] Change in fair value Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Gain (Loss) Included in Earnings Keystone Keystone Perfusion Services, LLC. [Member] Keystone Perfusion Services, LLC. 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