Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	6 Months Ended
	Jul. 03, 2018	Jul. 04, 2017
Operating activities
Net loss	$ (9,510)	$ (28,660)
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	11,617	12,546
Deferred income taxes	(251)	271
Restaurant impairments, closure costs and asset disposals	3,669	19,441
Loss on extinguishment of debt	626	0
Amortization of debt issuance costs	363	185
Stock-based compensation	1,592	945
Non-cash gain on litigation settlement	0	(421)
Changes in operating assets and liabilities:
Accounts receivable	837	2,465
Inventories	(751)	(468)
Prepaid expenses and other assets	(1,184)	46
Accounts payable	(2,909)	17
Deferred rent	(975)	1,479
Income taxes	(46)	60
Accrued expenses and other liabilities	(241)	(16,137)
Net cash provided by (used in) operating activities	2,837	(8,231)
Investing activities
Purchases of property and equipment	(7,051)	(12,213)
Net cash used in investing activities	(7,051)	(12,213)
Financing activities
Net (payments) borrowings from swing line loan	(101)	6,947
Proceeds from issuance of long-term debt	73,389	6,757
Payments on long-term debt	(66,873)	(37,015)
Issuance of preferred stock and common stock warrants, net of transaction expenses (see Note 9)	0	16,589
Issuance of common stock, net of transaction expenses (see Note 9)	0	29,110
Proceeds from exercise of stock options and employee stock purchase plan	(293)	37
Debt issuance costs	(1,629)	(662)
Net cash provided by financing activities	4,493	21,763
Effect of exchange rate changes on cash	0	2
Net increase in cash and cash equivalents	279	1,321
Cash and cash equivalents
Beginning of period	3,361	1,837
End of period	$ 3,640	$ 3,158