Note 16 - Basic and Diluted Loss Per Share - Net Income (Loss) Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Net loss	$ (1,190)	$ (1,957)	$ (3,003)
Weighted average number of shares of common stock outstanding during the year used to compute basic net loss per share (in thousands) (in shares)	22,827	22,512	22,229
Incremental shares attributable to exercise of outstanding options, SARs and RSUs (assuming proceeds would be used to purchase treasury stock) (in thousands) (in shares)
Weighted average number of shares of common stock used to compute diluted net loss per share (in thousands) (in shares)	22,827	22,512	22,229
Basic and diluted (in dollars per share)	$ (0.05)	$ (0.09)	$ (0.14)