Restatement - Balance Sheet Non-printing (Details) - USD ($) $ / shares in Units, $ in Thousands	Jul. 04, 2015	Dec. 31, 2014	Jun. 28, 2014
Accounting Changes and Error Corrections [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 223	$ 252	$ 254
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	$ 0.01
Common stock, shares authorized	35,000,000	35,000,000	35,000,000
Common stock, shares issued	11,082,460	10,952,268	10,892,133