Supplemental Financial Information (Accounts Receivable) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 30, 2014	Dec. 31, 2013
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 4,557	$ 4,229
Tenant Improvement [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	2,588	2,532
Vendor Rebate [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	983	748
Franchise and Other [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable	$ 986	$ 949