Note 9 - Net Income Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Net income (loss)	$ 1,213	$ (26,675)	$ 2,101	$ (21,445)
Weighted average shares outstanding - basic (in shares)	15,987,007	15,732,264	15,935,001	15,705,646
Dilutive common stock equivalents (in shares)	137,809	0	186,572	0
Weighted average shares outstanding - diluted (in shares)	16,124,816	15,732,264	16,121,573	15,705,646
Basic (in dollars per share)	$ 0.08	$ (1.70)	$ 0.13	$ (1.37)
Diluted (in dollars per share)	$ 0.08	$ (1.70)	$ 0.13	$ (1.37)