Note 9 - Net Income (Loss) Per Share of Common Stock - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Net loss	$ (4,872)	$ (1,696)
Basic (in shares)	23,334	23,103
Effect of stock -based awards (in shares)	0	0
Diluted weighted average common stock outstanding (in shares)	23,334	23,103
Basic net loss per share (in dollars per share)	$ (0.21)	$ (0.07)
Diluted net loss per share (in dollars per share)	$ (0.21)	$ (0.07)