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Note 12 - Fair Value Measurements - Minimum Assessment Agreements (Details) - Fair Value, Nonrecurring [Member] - Fair Value, Inputs, Level 3 [Member] - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Note receivable $ 419 $ 118,162
Obligation under assessment arrangements 20,199 22,293
Reported Value Measurement [Member]    
Note receivable 419 83,791
Obligation under assessment arrangements 17,752 19,304
Estimate of Fair Value Measurement [Member]    
Note receivable 419 82,338
Obligation under assessment arrangements $ 23,282 $ 25,738