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Financial Instruments - Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Assets |  |
Marketable equity securities | $ 19,051 |
Liabilities |  |
Contingent consideration (Note 3) | 2,768 |
Fair Value, Recurring |  |
Assets |  |
Marketable equity securities | 19,051 |
Liabilities |  |
Contingent consideration (Note 3) | 2,768 | $ 2,700
Total liabilities, fair value disclosure |  | 2,700
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Assets |  |
Marketable equity securities | 19,051 |
Liabilities |  |
Contingent consideration (Note 3) | 0 | 0
Total liabilities, fair value disclosure |  | 0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2) |  |
Assets |  |
Marketable equity securities | 0 |
Liabilities |  |
Contingent consideration (Note 3) | 0 | 0
Total liabilities, fair value disclosure |  | 0
Fair Value, Recurring | Significant Unobservable Inputs (Level 3) |  |
Assets |  |
Marketable equity securities | 0 |
Liabilities |  |
Contingent consideration (Note 3) | $ 2,768 | 2,700
Total liabilities, fair value disclosure |  | $ 2,700

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