Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 28, 2017	Mar. 22, 2016
Operating activities
Net income	$ 4,238	$ 3,061
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,103	5,486
Amortization of favorable and unfavorable lease assets and liabilities, net	(147)	(140)
Amortization of deferred financing costs and debt discount	89	89
Stock-based compensation	1,069	699
Deferred income taxes	193	1,100
(Gain) loss on disposal of assets, net	(49)	75
Restaurant closure charges	43	124
Changes in operating assets and liabilities:
Accounts and other receivables, net	994	589
Inventories	88	280
Prepaid expenses and other current assets	1,914	1,026
Other assets	(18)	0
Accounts payable	(402)	(854)
Other accrued liabilities	(280)	(1,372)
Other non-current liabilities	(207)	(937)
Net cash provided by operating activities	12,628	9,226
Investing activities
Purchases of property and equipment	(5,650)	(4,357)
Proceeds from disposal of property and equipment	0	7
Purchases of other assets	(201)	(267)
Proceeds from sale of company-operated restaurants	2,192	0
Net cash used in investing activities	(3,659)	(4,617)
Financing activities
Repurchase of common stock	(8,010)	(978)
Payment of tax withholding related to restricted stock vesting	(59)	0
Payments on capital leases and deemed landlord financing	(379)	(421)
Proceeds from revolving credit facility	3,000	0
Payments on revolving credit facility	(3,000)	0
Net cash used in financing activities	(8,448)	(1,399)
Increase in cash and cash equivalents	521	3,210
Cash and cash equivalents at beginning of period	8,795	10,194
Cash and cash equivalents at end of period	9,316	13,404
Supplemental cash flow information:
Cash paid during the period for interest	1,066	1,505
Cash paid during the period for income taxes	0	5
Supplemental schedule of non-cash activities:
Accrued property and equipment purchases	2,883	1,961
Write-offs of accounts receivables	0	72
Change in other asset for fair value of interest rate cap recorded to other comprehensive loss, net of tax	$ (88)	$ 0