Acquisition (Details)					3 Months Ended		15 Months Ended
	Oct. 02, 2018 USD ($)	Sep. 05, 2018 USD ($)	Aug. 21, 2018 USD ($)	Feb. 13, 2018 USD ($)	Mar. 31, 2019 USD ($)	Apr. 01, 2018 USD ($)	Mar. 31, 2019 USD ($)	Dec. 30, 2018 USD ($)	Jul. 01, 2018 USD ($)
Business Acquisition [Line Items]
Right of First Refusal, Number of States					20		20
Number of Restaurants Acquired							44
Business acquisitions, purchase price							$ 38,102,000
Proceeds from sale-leaseback transactions					$ 2,302,000	$ 1,292,000
Restaurant sales					290,789,000	271,586,000
Goodwill					38,469,000		$ 38,469,000	$ 38,469,000
2018 Acquisitions [Member]
Business Acquisition [Line Items]
Goodwill								$ 1,677,000
February 13, 2018 Acquisition 2 [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired				1
Business acquisitions, purchase price				$ 0
Franchise rights									$ 300,000
Liabilities assumed in excess of consideration									$ 200,000
August 21, 2018 Acquisition 2 [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired			2
Business acquisitions, purchase price			$ 1,666,000
September 5, 2018 Acquisition 2 [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired		31
Business acquisitions, purchase price		$ 25,930,000
October 2, 2018 Acquisition [Member]
Business Acquisition [Line Items]
Number of Restaurants Acquired	10
Business acquisitions, purchase price	$ 10,506,000
Acquired Restaurants [Member]
Business Acquisition [Line Items]
Restaurant sales					$ 13,000,000	$ 100,000