Note 3 - Net Income (Loss) Per Share (Details) - Net Income (Loss) Per Share - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Net Income (Loss) Per Share [Abstract]
Net income (in Dollars)	$ 167	$ 773	$ 1,670	$ 873
Income per share:
Basic (in Dollars per share)	$ 0.01	$ 0.04	$ 0.08	$ 0.04
Diluted (in Dollars per share)	$ 0.01	$ 0.03	$ 0.07	$ 0.04
Weighted average number of shares of common stock outstanding during the period used to compute basic net income per share (in thousands)	21,830	21,830	22,020	22,064
Incremental shares attributable to exercise of outstanding options, stock appreciation rights and restricted stock units (assuming proceeds would be used to purchase treasury stock) (in thousands)	1,038	1,243	1,470	765
Weighted average number of shares of common stock used to compute diluted net income per share (in thousands)	22,868	23,073	23,490	22,829