Note 9 - Net Income Per Share - Reconciliation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Net income (loss)	$ 3,114	$ (12,719)	$ 5,215	$ (34,164)
Weighted average shares outstanding - basic (in shares)	15,992,792	15,806,852	15,954,264	15,739,381
Dilutive common stock equivalents (in shares)	162,563	0	178,568	0
Weighted average shares outstanding - diluted (in shares)	16,155,355	15,806,852	16,132,832	15,739,381
Basic (in dollars per share)	$ 0.19	$ (0.8)	$ 0.33	$ (2.17)
Diluted (in dollars per share)	$ 0.19	$ (0.8)	$ 0.32	$ (2.17)