Note 13 - Net Income Per-share - Reconciliation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Net income	$ 126	$ 2,437
Weighted-average shares of common stock outstanding (in shares)	17,358	15,532
Basic net income per share (in dollars per share)	$ 0.01	$ 0.16
Total	$ 126	$ 2,437
Dilutive options and warrants outstanding (in shares)	3,576	3,147
Effect of conversion of convertible notes (in shares)
Number of shares used in diluted per-share computation (in shares)	20,934	18,679
Diluted net income per share (in dollars per share)	$ 0.01	$ 0.13