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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, 2022
Dec. 31, 2021
Note receivable $ 118,162 $ 103,574
Obligation under assessment arrangements 22,293 24,306
Reported Value Measurement [Member]    
Note receivable 83,791 31,766
Obligation under assessment arrangements 19,304 20,734
Estimate of Fair Value Measurement [Member]    
Note receivable 82,338 35,108
Obligation under assessment arrangements $ 25,738 $ 26,908