Supplemental Financial Information - Prepaid Expenses and Other Assets (Details) - USD ($) $ in Thousands	Jun. 29, 2021	Dec. 29, 2020
Supplemental Financial Information [Abstract]
Prepaid insurance	$ 992	$ 744
Prepaid occupancy related costs	34	884
Other prepaid expenses	2,552	1,092
Other current assets	117	39
Prepaid expenses and other assets	$ 3,695	$ 2,759

Amount of asset related to consideration paid in advance for insurance that provides economic benefits within a future period of one year or the normal operating cycle, if longer.

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Name:	us-gaap_PrepaidInsurance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant