Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Thousands	Jan. 01, 2016	Jan. 02, 2015
Accounts receivable, allowance for contract losses and doubtful accounts	$ 2,792	$ 3,386
Preferred Stock, Par or Stated Value Per Share	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	2,000	2,000
Preferred Stock, Shares Outstanding	0	0
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	7,133	7,111