CONDENSED CONSOLIDATED BALANCE SHEETS (unaudited) (Parenthetical) - USD ($) $ in Thousands	Mar. 31, 2016	Dec. 31, 2015
Statement of Financial Position [Abstract]
Allowance for doubtful accounts	$ 15	$ 15
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common Stock, shares authorized	100,000,000	100,000,000
Common Stock, shares issued	35,334,795	34,845,310
Common Stock, shares outstanding	28,818,901	28,329,416
Treasury Stock, shares	6,515,894	6,515,894