Basis Of Presentation And Summary of Significant Accounting Policies - Additional Information (Details)		3 Months Ended		12 Months Ended
	Jul. 30, 2014	Mar. 30, 2022 USD ($) restaurant segment item	Mar. 31, 2021 USD ($) restaurant	Dec. 29, 2021 USD ($)	Dec. 30, 2020 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments | segment		1
Leaves of absence and overtime pay due to COVID 19		$ 2,300,000	$ 2,800,000
Total amount of outstanding debt		40,000,000.0
Cash available		25,451,000		$ 30,046,000
Impairment of property and equipment		89,000	303,000
Unrecognized tax benefits, accrual of interest or penalties		0		$ 0
Unrecognized tax benefits, interest or penalties expenses		0	0
Percentage of cash savings in taxes realized as a result of utilizing net operating losses payable to pre-IPO stockholders	85.00%
Income tax receivable agreement (income) expense		(130,000)	(77,000)
Total deferred amount					$ 4,900,000
Percentage of deferred amount due by current fiscal year					50.00%
Percentage of deferred amount due by next fiscal year					50.00%
Minimum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Income tax receivable agreement (income) expense		$ (100,000)
Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Income tax receivable agreement (income) expense			$ (100,000)
Supplier Concentration Risk | Supplier One | Accounts Payable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number Of Suppliers | item		1
Percentage of concentration		20.60%		26.10%
Supplier Concentration Risk | Largest Supplier One | Purchased
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration		29.70%	25.50%
Geographic Concentration Risk | Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration		100.00%	100.00%
Texas
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants with ROU asset impairment charges | restaurant			1
California
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant		1	3
Greater Los Angeles area market | Geographic Concentration Risk | Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration		70.80%	70.10%
Closed Store
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Closed-store reserve expense			$ 300,000
Closed Store | Maximum
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Closed-store reserve expense		$ 100,000
Company-operated
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant		188
Franchised
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants | restaurant		293