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CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Statement of Financial Position [Abstract]    
Allowance for doubtful accounts trade receivable $ 25 $ 25
Preferred Stock, par value $ 0.001 $ 0.001
Preferred stock, shares authorized 5,000,000 5,000,000
Preferred Stock, shares issued 0 0
Preferred Stock, shares outstanding 0 0
Common Stock, par value $ 0.001 $ 0.001
Common Stock, shares authorized 60,000,000 60,000,000
Common Stock, shares issued 23,595,160 23,595,160
Common Stock, shares outstanding 20,529,933 20,252,490
Treasury stock, shares 3,065,227 3,342,670