Consolidated Statements Of Operations And Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended
	Oct. 01, 2017	Oct. 02, 2016	Oct. 01, 2017	Oct. 02, 2016
Revenues:
Restaurant sales	$ 285,235,000	$ 238,870,000	$ 804,565,000	$ 702,757,000
Costs and expenses:
Cost of sales	81,850,000	63,844,000	224,810,000	184,981,000
Restaurant wages and related expenses	91,540,000	75,678,000	260,559,000	221,306,000
Restaurant rent expense	19,574,000	16,081,000	56,063,000	48,077,000
Other restaurant operating expenses	42,884,000	37,606,000	123,989,000	110,611,000
Advertising expense	11,693,000	10,857,000	33,025,000	30,755,000
General and administrative	14,699,000	13,000,000	44,686,000	40,561,000
Depreciation and amortization	13,655,000	12,070,000	40,172,000	34,613,000
Impairment and other lease charges	1,039,000	685,000	2,002,000	1,193,000
Other expense	(383,000)	0	(354,000)	1,035,000
Total operating expenses	276,551,000	229,821,000	784,952,000	673,132,000
Income from operations	8,684,000	9,049,000	19,613,000	29,625,000
Interest expense	5,937,000	4,560,000	15,767,000	13,615,000
Income (loss) before income taxes	2,747,000	4,489,000	3,846,000	16,010,000
Provision (benefit) for income taxes	(48,000)	0.0	608,000	0
Net income (loss)	$ 2,795,000	$ 4,489,000	$ 3,238,000	$ 16,010,000
Basic and diluted net income (loss) per share	$ 0.06	$ 0.10	$ 0.07	$ 0.35
Basic weighted average common shares outstanding	35,431,806	35,237,053	35,410,482	35,152,091
Diluted weighted average common shares outstanding	44,937,641	44,855,778	44,966,264	44,892,188
Other comprehensive income (loss), net of tax:
Net income (loss)	$ 2,795,000	$ 4,489,000	$ 3,238,000	$ 16,010,000
Other comprehensive income (loss)	0	0	0	0
Comprehensive income (loss)	$ 2,795,000	$ 4,489,000	$ 3,238,000	$ 16,010,000