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