Note 4 - Supplemental Cash Flow Information - Schedule of Supplemental Cash Flow Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash paid for:
Interest	$ 3,537	$ 2,721	$ 53
Income taxes, net of refunds	10,568	13,200	5,914
Non-cash investing and financing activities:
Capital additions accrued but not yet paid	536	125	135
Accrued contingent consideration	13,096	14,568	9,731
Present value of non-competition payments	$ 8,474	$ 10,043	$ 9,477