Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
	Jun. 30, 2021	Jun. 30, 2021	Jun. 24, 2020
Cash flows from operating activities:
Net income (loss)	$ 8,818	$ 12,782	$ 9,099
Adjustments to reconcile net income (loss) to net cash flows provided by operating activities:
Depreciation and amortization	3,917	7,855	8,537
Stock-based compensation expense	1,000	1,894	1,261
Income tax receivable agreement expense (income)	27	(50)	170
Loss on assets held for sale	1,524	1,524
Loss on disposal of assets	85	111	127
Impairment of property and equipment	400	666	1,972
Amortization of deferred financing costs		126	126
Deferred income taxes, net		881	(363)
Changes in operating assets and liabilities:
Accounts and other receivables		(507)	(7,610)
Inventories		73	55
Prepaid expenses and other current assets		558	3,021
Income taxes receivable/payable		2,014
Other assets		(312)	339
Accounts payable		(557)	3,610
Accrued salaries and vacation		279	(2,342)
Accrued insurance		362	698
Payment related to tax receivable agreement			2,069
Other accrued expenses and liabilities		(1,075)	(9,687)
Net cash flows provided by operating activities		26,624	11,082
Cash flows from investing activities:
Proceeds from disposition of restaurants		4,556
Purchase of property and equipment		(8,828)	(2,479)
Net cash flows used in investing activities		(4,272)	(2,479)
Cash flows from financing activities:
Proceeds from borrowings on revolver and swingline loans			52,500
Payments on revolver and swingline loan		(22,800)	(10,700)
Minimum tax withholdings related to net share settlements		(660)	(280)
Proceeds from issuance of common stock upon exercise of stock options, net of expenses		566	2,165
Payment of obligations under finance leases		(53)	(16)
Net cash flows used in financing activities		(22,947)	43,669
Increase (decrease) in cash and cash equivalents		(595)	52,272
Cash and cash equivalents, beginning of period		13,219	8,070
Cash and cash equivalents, end of period	$ 12,624	12,624	60,342
Supplemental cash flow information
Cash paid during the period for interest		598	1,738
Cash paid during the period for income taxes		2,094	434
Unpaid purchases of property and equipment		$ 1,038	$ 846