Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 24, 2020	Mar. 26, 2019
Operating activities
Net (loss) income	$ (102,468)	$ 1,425
Adjustments to reconcile net (loss) income to net cash provided by operating activities:
Depreciation and amortization	6,137	5,907
Amortization of deferred financing costs, debt discount and interest rate cap	123	118
Amortization of operating lease assets	5,112	4,963
Stock-based compensation	1,225	1,577
Impairment of goodwill	87,277	0
Impairment of trademarks	11,900	0
Impairment of long-lived assets	8,287	0
Deferred income taxes	(10,158)	196
Loss on disposal of assets and adjustments to assets held for sale, net	122	290
Restaurant closure charges	46	118
Changes in operating assets and liabilities:
Accounts and other receivables, net	1,326	(48)
Inventories	86	259
Prepaid expenses and other current assets	3,357	2,297
Other assets	(95)	(18)
Accounts payable	(711)	(1,317)
Operating lease liabilities	(4,863)	(4,695)
Other accrued liabilities	6,796	(1,051)
Other non-current liabilities	(940)	(118)
Net cash provided by operating activities	12,559	9,903
Investing activities
Purchases of property and equipment	(7,983)	(7,007)
Proceeds from disposal of property and equipment, net	1,440	10,040
Purchases of other assets	(384)	(515)
Acquisition of franchisees	0	(3,120)
Proceeds from sale of company-operated restaurants	1,219	2,090
Net cash (used in) provided by investing activities	(5,708)	1,488
Financing activities
Proceeds from issuance of common stock	0	0
Repurchase of common stock and warrants	0	(4,306)
Payment of tax withholding related to restricted stock vesting	(105)	(84)
Payments on finance leases and other debt	(29)	(146)
Proceeds from revolving credit facility	40,000	9,000
Payments on revolving credit facility	(10,000)	(14,000)
Proceeds from exercise of stock options	0	16
Net cash provided by (used in) financing activities	29,866	(9,520)
Increase in cash and cash equivalents	36,717	1,871
Cash and cash equivalents at beginning of period	1,421	7,153
Cash and cash equivalents at end of period	38,138	9,024
Supplemental cash flow information:
Cash paid during the period for interest	854	1,134
Cash paid during the period for income taxes	0	0
Supplemental schedule of non-cash activities:
Accrued property and equipment purchases	5,039	4,342
Amortization of interest rate cap into net income, net of tax	45	21
Change in other asset for fair value of interest rate cap recorded to other comprehensive (loss) income, net of tax	0	(139)
Operating lease right-of-use assets obtained in exchange for lease obligations	9,358	240,160
Finance lease right-of-use assets obtained in exchange for lease obligations	0	1,185
Impairment on operating lease right-of-use assets related to the adoption of new accounting pronouncements	$ 0	$ 3,116