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Note 8 - Income Taxes (Details Textual) - USD ($) $ in Thousands | 12 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019 | Sep. 01, 2021 | May 03, 2021 | Oct. 01, 2020 | Aug. 07, 2019
Stock-based Compensation, Tax Benefits | $ 10,500 | $ 3,200 | $ 2,300 |  |  |  |
Operating Loss Carryforwards, Total | 120,600 |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Subject to Expiration | 39,500 |  |  |  |  |  |
Deferred Tax Assets, Operating Loss Carryforwards, Not Subject to Expiration | 81,100 |  |  |  |  |  |
GCI Acquisition [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities | 24,100 |  |  |  | $ 24,133 |  |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 8,000 |  |  |  |  |  |
Sexton Acquisition [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities | 1,500 |  |  | $ 1,482 |  |  |
SciSafe Holdings, Inc [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  |  |  | $ 3,297 |
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | 3,300 |  |  |  |  |  |
SAVSU [Member] |  |  |  |  |  |  |
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Deferred Tax Liabilities |  |  |  |  |  |  | $ 1,541
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount | $ 1,500 |  |  |  |  |  |

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