Note 12 - Commitments and Contingencies - Redeemable Non-controlling Interest (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Balance	$ 14,458	$ 10,473	$ 10,626	$ 7,494
Net income (loss) attributable to noncontrolling interest	198	(437)	(229)	(1,056)
Redemption value adjustment of put option	4,939	0	9,198	0
Acquired businesses' noncontrolling interest	0	0	0	3,598
Ending balance	$ 19,595	$ 10,036	$ 19,595	$ 10,036