Condensed Consolidated Statement of Cash Flows Statement - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2018	Mar. 29, 2017
Statement of Cash Flows [Abstract]
Net income	$ 2,529	$ 4,877
Depreciation and amortization	4,212	4,317
Stock-based compensation expense	531	141
Income tax receivable agreement (income) expense	(918)	227
Loss on disposal of assets	(61)	(225)
Impairment of property and equipment	0	22
Closed-store reserve	2,819	849
Amortization of deferred financing costs	76	76
Amortization of favorable and unfavorable leases, net	(17)	(26)
Deferred income taxes, net	606	3,400
Increase (Decrease) in Accounts and Other Receivables	586	1,050
Increase (Decrease) in Inventories	(218)	(199)
Increase (Decrease) in Prepaid Expense and Other Assets	790	1,342
Increase (Decrease) in Income Taxes	58	(32)
Increase (Decrease) in Other Operating Assets	(97)	(141)
Increase (Decrease) in Accounts Payable	(673)	2,694
Increase (Decrease) in Employee Related Liabilities	1,896	3,624
Increase (Decrease) in Insurance Liabilities	155	141
Increase (Decrease) in Other Accrued Liabilities	2,059	525
Increase (Decrease) in Restricted Cash	0	(125)
Net cash flows provided by operating activities	12,333	19,133
Purchase of property and equipment	6,648	11,601
Net cash flows used in investing activities	(6,648)	(11,601)
Payments on revolver loan	8,000	3,000
Payment of obligations under capital leases	32	48
Net cash flows used in financing activities	(8,032)	(3,048)
(Decrease) increase in cash and cash equivalents	(2,347)	4,484
Cash and cash equivalents	6,203	6,652
Interest Paid	662	821
Income Taxes Paid	0	100
Capital Expenditures Incurred but Not yet Paid	$ 2,022	$ 3,161