Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jun. 18, 2019	Jun. 19, 2018
Operating activities
Net income	$ 3,517	$ 7,439
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	11,720	11,761
Amortization of favorable and unfavorable lease assets and liabilities, net	0	(250)
Amortization of deferred financing costs, debt discount and interest rate cap	244	194
Amortization of operating lease assets	9,915	0
Stock-based compensation	3,254	2,634
Impairment of long-lived assets	3,694	1,661
Deferred income taxes	(138)	471
Loss on disposal of assets, net	884	180
Restaurant closure charges	118	65
Changes in operating assets and liabilities:
Accounts and other receivables, net	904	1,272
Inventories	101	2
Prepaid expenses and other current assets	1,003	4,117
Other assets	(67)	(41)
Accounts payable	543	(2,867)
Operating lease liabilities	(9,316)	0
Other accrued liabilities	(1,446)	1,890
Other non-current liabilities	865	1,195
Net cash provided by operating activities	25,795	29,723
Investing activities
Purchases of property and equipment	(17,895)	(17,504)
Proceeds from disposal of property and equipment, net	12,696	573
Purchases of other assets	(776)	(743)
Acquisition of franchisees	(3,120)	0
Proceeds from sale of company-operated restaurants	2,090	0
Net cash used in investing activities	(7,005)	(17,674)
Financing activities
Repurchase of common stock and warrants	(7,373)	(4,791)
Payment of tax withholding related to restricted stock vesting	(84)	(79)
Payments on finance leases, other debt and deemed landlord financing	(267)	(714)
Proceeds from revolving credit facility	14,000	5,000
Payments on revolving credit facility	(27,000)	(5,000)
Proceeds from exercise of stock options	31	122
Net cash used in financing activities	(20,693)	(5,462)
(Decrease) increase in cash and cash equivalents	(1,903)	6,587
Cash and cash equivalents at beginning of period	7,153	6,559
Cash and cash equivalents at end of period	5,250	13,146
Supplemental cash flow information:
Cash paid during the period for interest	3,008	3,412
Cash paid during the period for income taxes	1,764	666
Supplemental schedule of non-cash activities:
Accrued property and equipment purchases	5,939	1,833
Write-offs of accounts receivables	21	6
Reclassification of interest rate cap amortization included in net income	47	16
Change in other asset for fair value of interest rate cap recorded to other comprehensive (loss) income, net of tax	(270)	289
Operating lease right-of-use assets obtained in exchange for lease obligations	252,440	0
Finance lease right-of-use assets obtained in exchange for lease obligations	1,185	0
Impairment on operating lease right-of-use assets related to the adoption of new accounting pronouncement	$ 3,116	$ 0