Condensed Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Oct. 02, 2015	Jan. 02, 2015
Accounts receivable, allowance for contract losses and doubtful accounts	$ 3,340	$ 3,386
Common stock, par value	$ 0.001	$ 0.001
Common stock, shares authorized	80,000	80,000
Common stock, shares issued	32,853	32,853
Treasury stock, shares	7,172	7,111