CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 27, 2015	Dec. 31, 2014
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	50,000,000	50,000,000
Common stock, shares issued	18,073,588	17,997,665
Common stock, shares outstanding	17,393,353	17,317,430
Treasury stock, shares	680,235	680,235