Revenue Recognition - Contract Liabilities (Details) $ in Thousands	4 Months Ended
	Dec. 19, 2018 USD ($)
Gift Cards, net of discounts
Revenue From Contract With Customer, Contract Liability [Roll Forward]
Contract liability, beginning of period	$ 2,707
Revenue recognized that was included in the contract liability balance at the beginning of the year	(635)
Increase, net of amounts recognized as revenue during the period	2,022
Contract liability, end of period	4,094
Franchise Fees
Revenue From Contract With Customer, Contract Liability [Roll Forward]
Contract liability, beginning of period	1,891
Revenue recognized that was included in the contract liability balance at the beginning of the year	(464)
Increase, net of amounts recognized as revenue during the period	35
Contract liability, end of period	$ 1,462