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Tax receivable agreement (income) expenses.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details)		1 Months Ended	3 Months Ended		9 Months Ended	12 Months Ended
	Jul. 30, 2014	May 03, 2019 USD ($)	Mar. 27, 2019 USD ($) restaurant supplier segment	Mar. 28, 2018 USD ($)	Mar. 25, 2020	Dec. 27, 2017 USD ($) supplier	Apr. 30, 2019 USD ($)	Dec. 26, 2018 USD ($)
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of operating segments \| segment			1
Treasury Stock, Value, Acquired, Cost Method			$ 3,383,000
Total amount of outstanding debt			71,200,000
Cash available			6,699,000	$ 6,203,000		$ 8,550,000		$ 6,969,000
Recovery of securities lawsuits related legal expenses			0	(1,634,000)
Assets held for sale			4,494,000					0
Loss on assets held for sale			4,124,000	0
Property and equipment owned, net			94,319,000					104,145,000
Closed-store reserve expense (recovery)			0	2,819,000
Unrecognized tax benefits, accrual of interest or penalties			0					$ 0
Unrecognized tax benefits, interest or penalties expenses			$ 0	0
Federal statutory tax rate			21.00%			35.00%
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 expense (income)			$ 171,000	(918,000)
Indefinite-lived Intangible Assets
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Asset Impairment Charges			$ 0	$ 0
Supplier Concentration Risk
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of suppliers \| supplier			0			1
Supplier Concentration Risk \| Accounts Payable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration			10.00%
Supplier Concentration Risk \| Supplier One \| Accounts Payable
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration						36.00%
Supplier Concentration Risk \| Largest Supplier One \| Purchased
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration			26.60%	28.00%
Geographic Concentration Risk \| Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration			100.00%	100.00%
Subsequent Event
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Stock Repurchase Program, Authorized Amount							$ 30,000,000
Stock Repurchase Program Expiration Date					Mar. 25, 2020
Fair Value, Measurements, Nonrecurring
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Loss on assets held for sale			$ 4,124,000
Fair Value, Inputs, Level 1 \| Fair Value, Measurements, Nonrecurring
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment owned, net			0	$ 0.0
Fair Value, Inputs, Level 2 \| Fair Value, Measurements, Nonrecurring
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment owned, net			0
Fair Value, Inputs, Level 3 \| Fair Value, Measurements, Nonrecurring
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment owned, net			$ 4,494,000
Credit Agreement Two Thousand Eighteen \| Subsequent Event
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Repayments of Debt		$ 4,000,000
Los Angeles \| Geographic Concentration Risk \| Revenue
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Percentage of concentration			69.20%	69.20%
TEXAS
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants closed			1	2
CALIFORNIA
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants closed			1
Entity Operated Units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants \| restaurant			211
Franchised Units
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants \| restaurant			273
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] \| Fair Value, Measurements, Nonrecurring
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Property and equipment owned, net			$ 4,494,000
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] \| ARIZONA
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants			7
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] \| CALIFORNIA
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Number of restaurants			4
closed store [Member]
Basis Of Presentation And Summary Of Significant Accounting Policies [Line Items]
Operating Lease, Expense			$ 300,000