Note 3 - Acquisitions - Pro Forma Information (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Videology [Member]
Revenue	$ 92,591	$ 63,422
Net earnings	$ 9,024	$ 1,167
Diluted earnings per share (in dollars per share)	$ 0.84	$ 0.11
Acculogic [Member]
Revenue	$ 95,490	$ 66,484
Net earnings	$ 7,180	$ 842
Diluted earnings per share (in dollars per share)	$ 0.67	$ 0.08