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Receivables (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 27, 2023	Dec. 28, 2022	Dec. 29, 2021
Receivables, net:
Trade accounts receivable from franchisees	$ 14,092	$ 13,314
Notes and loan receivables from franchisees	584	6,731
Allowance for doubtful accounts	(201)	(376)
Total receivables, net	21,391	25,576
Reversals of credit losses	100	100	$ 1,100
Vendor receivables
Receivables, net:
Other receivable, gross, current	4,059	3,466
Credit card receivables
Receivables, net:
Other receivable, gross, current	995	896
Other
Receivables, net:
Other receivable, gross, current	$ 1,862	$ 1,545

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