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Receivables - Receivables, Net (Details) - USD ($) $ in Thousands	Mar. 30, 2022	Dec. 29, 2021
Receivables, net:
Trade accounts receivable from franchisees	$ 12,897	$ 13,430
Financing receivables from franchisees	2,811	1,027
Allowance for doubtful accounts	(549)	(574)
Receivables, net	23,161	19,621
Other noncurrent assets:
Financing receivables from franchisees	252	293
Vendor receivables
Receivables, net:
Other receivables, gross, current	2,803	4,041
Credit card receivables
Receivables, net:
Other receivables, gross, current	625	747
Other
Receivables, net:
Other receivables, gross, current	$ 4,574	$ 950

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