Note 7 - Net Income (Loss) Per Share - Calculations of Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Basic:
Net income (loss)	$ (3,484)	$ (6,709)
Basic (in shares)	16,072	16,587
Basic (in dollars per share)	$ (0.22)	$ (0.40)
Diluted:
Net income (loss)	$ (3,484)	$ (6,709)
Basic (in shares)	16,072	16,587
Unvested restricted stock and DSU's (in shares)	0	0
Employee stock options (in shares)	0	0
Diluted (in shares)	16,072	16,587
Diluted (in dollars per share)	$ (0.22)	$ (0.40)