Condensed Consolidated Statements of Operations - USD ($) $ in Thousands	3 Months Ended
	Apr. 03, 2018	Apr. 04, 2017
Revenue:
Restaurant revenue	$ 109,613	$ 115,527
Franchising royalties and fees	913	1,188
Total revenue	110,526	116,715
Restaurant operating costs (exclusive of depreciation and amortization shown separately below):
Cost of sales	29,256	32,087
Labor	36,572	39,594
Occupancy	12,763	14,001
Other restaurant operating costs	16,898	17,147
General and administrative	10,268	10,666
Depreciation and amortization	5,820	6,267
Pre-opening	47	545
Restaurant impairments, closure costs and asset disposals	1,580	22,054
Total costs and expenses	113,204	142,361
Loss from operations	(2,678)	(25,646)
Interest expense, net	1,138	1,008
Loss before income taxes	(3,816)	(26,654)
(Benefit) provision for income taxes	(241)	191
Net loss	(3,575)	(26,845)
Accretion of preferred stock to redemption value	0	(965)
Net loss attributable to common stockholders	$ (3,575)	$ (27,810)
Loss per share of Class A and Class B common stock, combined:
Basic (USD per share)	$ (0.09)	$ (0.99)
Diluted (USD per share)	$ (0.09)	$ (0.99)
Weighted average shares of Class A and Class B common stock outstanding, combined:
Basic (in shares)	41,128,473	28,073,333
Diluted (in shares)	41,128,473	28,073,333