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Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 30, 2017
Dec. 31, 2016
Jan. 02, 2016
Cash flows from operating activities:      
Net income $ 7,916 $ 1,377 $ 27,345
Adjustments to reconcile net income to net cash provided by operating activities:      
Depreciation and amortization 16,165 16,171 16,419
Stock-based compensation 3,423 3,025 2,111
Asset impairment 104 2,674 296
Deferred taxes 5,262 2,263 (8,123)
Provision for doubtful accounts 372 1,972 19
Loss on disposal of property and equipment 225 403 282
Trade credit utilization 185
Change in assets and liabilities:      
Inventories (210) 643 (2,466)
Receivables (584) (2,207) (2,118)
Prepaid expenses and other assets (341) 1,184 (2,998)
Accounts payable and accrued expenses (10,484) (16,301) 1,458
Lease related liabilities 2,316 3,427 (1,182)
Gift cards and customer deposits (3,376) 2,091 1,037
Deferred revenue 300 (708) (218)
Net cash provided by operating activities 21,088 16,014 32,047
Cash flows from investing activities:      
Purchases of property and equipment (17,763) (27,251) (22,466)
Purchases of other assets and other intangible assets (310) (867) (1,922)
Proceeds from property insurance 310
Proceeds from sale or maturity of short term investments 1,461 793
Purchases of short term investments (1,551)
Cash flow used in investing activities (17,763) (26,657) (25,146)
Cash flows from financing activities:      
Proceeds from the exercise of employee stock options, net of withholding tax payments (467) (479) (481)
Borrowings under line of credit 4,000 5,400
Repayments under line of credit (4,000) (5,400)
Payments made under capital leases (76)
Purchases of Company's common stock (4,232) (1,469) (25,909)
Cash flow used in financing activities (4,775) (1,948) (26,390)
Effect of exchange rates on cash (588) (122) (704)
Net decrease in cash and cash equivalents (2,038) (12,713) (20,193)
Cash and cash equivalents, beginning of period 32,483 45,196 65,389
Cash and cash equivalents, end of period 30,445 32,483 45,196
Supplemental disclosure of cash flow information:      
Net cash paid during the period for income taxes $ 1,072 $ 1,002 $ 2,175