Note 13 - Net Loss Per Share - Computation of Net Income(Loss) Allocated to Common Shareholders (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Net loss	$ (3,754)	$ (6,220)
Less loss allocated to RSUs	35	94
Net loss allocated to common shareholders	$ (3,719)	$ (6,126)
Weighted average number of common shares outstanding (in shares)	30,614	30,446
Basic and diluted (in dollars per share)	$ (0.12)	$ (0.20)