Consolidated Statements Of Operations And Comprehensive Loss - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Revenues:
Restaurant sales	$ 296,917,000	$ 285,235,000	$ 871,553,000	$ 804,565,000
Costs and expenses:
Cost of sales	82,082,000	81,850,000	237,004,000	224,810,000
Restaurant wages and related expenses	95,391,000	91,540,000	283,489,000	260,559,000
Restaurant rent expense	20,259,000	19,574,000	60,112,000	56,063,000
Other restaurant operating expenses	45,510,000	42,884,000	132,938,000	123,989,000
Advertising expense	12,120,000	11,693,000	35,741,000	33,025,000
General and administrative (including stock-based compensation expense of $1,385, $903, $2,970 and $1,786 respectively)	17,602,000	14,699,000	49,758,000	44,686,000
Depreciation and amortization	14,555,000	13,655,000	43,426,000	40,172,000
Impairment and other lease charges	164,000	1,039,000	3,354,000	2,002,000
Other expense (income), net	(434,000)	(383,000)	(434,000)	(354,000)
Total operating expenses	287,249,000	276,551,000	845,388,000	784,952,000
Income from operations	9,668,000	8,684,000	26,165,000	19,613,000
Interest expense	5,909,000	5,937,000	17,752,000	15,767,000
Gain on bargain purchase (Note 2)	0	0	(230,000)	0
Income before income taxes	3,759,000	2,747,000	8,643,000	3,846,000
Provision for income taxes (Note 7)	148,000	(48,000.0)	346,000	608,000
Net income	$ 3,611,000	$ 2,795,000	$ 8,297,000	$ 3,238,000
Basic and diluted net income (loss) per share	$ 0.08	$ 0.06	$ 0.18	$ 0.07
Basic weighted average common shares outstanding	35,735,680	35,431,806	35,707,245	35,410,482
Diluted weighted average common shares outstanding	45,410,556	44,937,641	45,293,255	44,966,264
Other comprehensive income (loss), net of tax:
Net income	$ 3,611,000	$ 2,795,000	$ 8,297,000	$ 3,238,000
Other comprehensive income	0	0	0	0
Comprehensive income	$ 3,611,000	$ 2,795,000	$ 8,297,000	$ 3,238,000