Note 13 - Segment Information - Assets by Geographic Area (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenue	$ 147,954	$ 133,277	$ 127,982
Long-lived assets	83,833	79,311	81,528
Total assets	157,540	133,423	110,685
UNITED STATES
Revenue	144,987	130,305	124,369
Long-lived assets	83,722	77,448	78,906
Total assets	153,879	128,319	95,668
CANADA
Revenue	2,967	2,972	3,613
Long-lived assets	111	1,863	2,622
Total assets	$ 3,661	$ 5,104	$ 15,017