Note 9 - Net Loss Per Share - Calculation of Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Net loss	$ (528)	$ (2,691)
Basic weighted-average shares outstanding (in shares)	32,703	32,485
Effect of dilutive options and restricted stock units (in shares)
Diluted weighted average shares outstanding (in shares)	32,703	32,485
Basic (in dollars per share)	$ (0.02)	$ (0.08)
Diluted (in dollars per share)	$ (0.02)	$ (0.08)