Note 5 - Net Income (Loss) Per-share - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Net income (loss)	$ 15	$ (786)
Weighted-average shares of common stock outstanding (in shares)	21,899	21,542
Basic net income (loss) per share (in dollars per share)	$ 0	$ (0.04)
Dilutive options and warrants outstanding (in shares)	469	0
Number of shares used in diluted per share computation (in shares)	22,368	21,542
Diluted income (loss) per common share (in dollars per share)	$ 0	$ (0.04)