Credit Agreement (Details) - Amended Credit Facility, Wells Fargo Bank [Member] - USD ($)	6 Months Ended
	Jul. 04, 2015	Jan. 03, 2015
Line of Credit Facility [Line Items]
Current borrowing capacity	$ 20,000,000
Line of Credit Facility Amended Expiration Date	Aug. 31, 2016
Maximum borrowing capacity	$ 50,000,000
Adjusted LIBO Rate basis (in hundredths)	1.25%
Adjusted Base Rate - Daily One-Month LIBO Rate basis (in hundredths)	1.50%
Available remaining borrowing capacity	$ 20,000,000	$ 20,000,000
Outstanding letters of credit	$ 0	$ 0