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Note 5 - Fair Value Measurements - Reconciliation of Contingent Consideration (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2022 | Mar. 31, 2021
Changes in fair value | $ 6,446 | $ (281)
Contingent Consideration Liability [Member] |  |
Beginning balance, January 1, 2022 | 146,759 |
Changes in fair value | (6,753) |
Present value interest accretion | 682 |
Currency translation | (1,225) |
Ending balance, March 31, 2022 | $ 139,463 |

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- Definition The amount of increase due to present value interest accretion in contingent consideration arrangements from business combinations. + References No definition available. + Details
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