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Note 4 - Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Cash paid for:      
Interest $ 2,721 $ 53 $ 71
Income taxes, net of refunds 13,200 5,914 2,481
Non-cash investing and financing activities:      
Capital additions accrued but not yet paid 125 135 225
Accrued contingent consideration 14,568 9,731 0
Present value of non-competition payments 10,043 9,477 0
Finance lease right of use assets 0 187 108
Finance lease liabilities 0 (187) (108)
Operating lease right of use assets 329 7,782 0
Operating lease liabilities $ (329) $ (7,782) $ 0