Credit Facility (Narrative) (Details) - USD ($)	12 Months Ended
	Jan. 01, 2016	Mar. 14, 2016	Jan. 02, 2015	Aug. 27, 2013	Feb. 21, 2012
Line of Credit Facility [Line Items]
Issuance costs					$ 600,000
Amended Credit Facility [Member]
Line of Credit Facility [Line Items]
Interest rate per annum	1.90%
Base Rate [Member] | Amended Credit Facility [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Amended Credit Facility [Member]
Line of Credit Facility [Line Items]
Margin percentage base rate	0.75%
Revolving line of credit facility [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility					20,000,000
Credit facility amount outstanding	$ 20,000,000	$ 5,000,000	$ 0
Term Loan [Member]
Line of Credit Facility [Line Items]
Borrowing capacity under credit facility					$ 30,000,000
Credit facility amount outstanding	30,000,000		$ 18,300,000
Revolving Line Of Credit Facility And Term Loan [Member]
Line of Credit Facility [Line Items]
Credit facility amount outstanding	$ 0
Additional borrowing capacity				$ 17,000,000