Note 4 - Net Earnings Per Share - Computation of Basic and Diluted Net Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Net income (loss)	$ 59	$ (336)	$ 117	$ (750)
Weighted average outstanding shares of common stock (in shares)	2,042	2,042	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	2,042	2,042
Basic net income (loss) per share (in dollars per share)	$ 0.03	$ (0.16)	$ 0.06	$ (0.37)
Diluted net income (loss) per share (in dollars per share)	$ 0.03	$ (0.16)	$ 0.06	$ (0.37)