Note 5 - Goodwill and Intangible Assets - Carrying Value of Goodwill (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Balance at beginning of period	$ 12,513	$ 12,826	$ 12,513	$ 682
Goodwill acquired	0	0	0	12,144
Recast adjustments	0	(233)	0	(233)
Impairment	0	0	0	0
Balance at end of period	$ 12,513	$ 12,593	$ 12,513	$ 12,593