Basis of Presentation and Summary of Significant Accounting Policies Basis of Presentation and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 27, 2018

Jun. 28, 2017

Accounting Policies [Abstract]

Fair Value, Assets Measured on Recurring and Nonrecurring Basis [Table Text Block]

The following non-financial instruments were measured at fair value, on a nonrecurring basis, as of and for the thirteen and twenty-six weeks ended June 27, 2018, reflecting certain property and equipment assets for which an impairment loss was recognized during the corresponding periods, as discussed immediately below under "Impairment of Long-Lived Assets:"

			Fair Value Measurements at June 27, 2018 Using						Thirteen Weeks Ended June 27, 2018		Twenty-Six Weeks Ended June 27, 2018
	Total		Level 1		Level 2		Level 3		Impairment Losses		Impairment Losses
Property and equipment owned, net	$	—	$	—	$	—	$	—	$	1,708	1,708

The following non-financial instruments were measured at fair value, on a nonrecurring basis, as of and for the thirteen and twenty-six weeks ended June 28, 2017, reflecting certain property and equipment assets for which an impairment loss was recognized during the corresponding periods, as discussed immediately below under "Impairment of Long-Lived Assets:"

			Fair Value Measurements at June 28, 2017 Using						Thirteen Weeks Ended June 28, 2017		Twenty-Six Weeks Ended June 28, 2017
	Total		Level 1		Level 2		Level 3		Impairment Losses		Impairment Losses
Property and equipment owned, net	$	302	$	—	$	—	$	302	$	387	387

Condensed Balance Sheet [Table Text Block]

The following tables summarize the impacts of adopting ASU 2014-09 on the Company’s consolidated financial statements as of and for the thirteen and twenty-six weeks ended June 27, 2018:

	Impact of changes in accounting policies
June 27, 2018 (in thousands)	As Reported			Adjustments			Balances without adoption of ASU 2014-09
Assets
Current assets:
Deferred tax assets	$	6,713		$	1,285		$	5,428
Total assets	448,648			1,285			447,363
Liabilities and Stockholders' Equity
Current liabilities:
Other accrued expenses and current liabilities	15,172			347			14,825
Total current liabilities	50,622			347			50,275
Other noncurrent liabilities	21,278			4,364			16,914
Total liabilities	168,520			4,711			163,809
Stockholders' Equity
Accumulated deficit	(94,340		)	(3,426		)	(90,914		)
Total stockholders' equity	280,128			(3,426		)	283,554
Total liabilities and stockholder’s equity	448,648			1,285			447,363

Condensed Income Statement [Table Text Block]

	Thirteen Weeks Ended June 27, 2018				Twenty-Six Weeks Ended June 27, 2018
	As Reported	Adjustments		Balances without adoption of ASU 2014-09	As Reported	Adjustments		Balances without adoption of ASU 2014-09
Revenue
Franchise revenue	6,553	(56	)	6,609	12,659	(68	)	12,727
Franchise advertising fee revenue	5,453	5,453		—	10,550	10,550		—
Total revenue	111,633	5,397		106,236	217,389	10,482		206,907
Cost of operations
Franchise expenses	6,250	5,453		797	12,082	10,550		1,532
Total expenses	104,044	5,453		98,591	205,352	10,550		194,802
Income from operations	7,589	(56	)	7,645	12,037	(68	)	12,105
Income before provision for income taxes	5,917	(56	)	5,973	10,395	(68	)	10,463
Net income	5,052	(56	)	5,108	7,581	(68	)	7,649