Note 3 - Acquisitions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021
Videology [Member]
Revenue	$ 23,356	$ 69,330
Net earnings	$ 2,552	$ 8,613
Diluted earnings per share (in dollars per share)	$ 0.24	$ 0.81
Acculogic [Member]
Revenue	$ 23,874	$ 70,710
Net earnings	$ 2,148	$ 6,915
Diluted earnings per share (in dollars per share)	$ 0.20	$ 0.65