Note 4 - Net Earnings Per Share - Computation of Basic and Diluted Net Loss Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Net income (loss)	$ 58	$ (414)
Weighted average outstanding shares of common stock (in shares)	2,042	2,042
Dilutive potential common shares from employee stock options (in shares)
Common stock and common stock equivalents (in shares)	2,042	2,042
Basic net income (loss) per share (in dollars per share)	$ 0.03	$ (0.20)
Diluted net income (loss) per share (in dollars per share)	$ 0.03	$ (0.20)