Income Taxes - Additional Information (Details) - USD ($)		12 Months Ended
	Jul. 30, 2014	Dec. 25, 2019	Dec. 26, 2018	Dec. 27, 2017
Investments, Owned, Federal Income Tax Note [Line Items]
Unrecognized Tax Benefits		$ 0	$ 0	$ 0
Change in tax rate, decrease in deferred tax asset				12,100,000
Net benefit to deferred income tax expense		0	0	1,440,000
Valuation allowance		5,993,000	5,149,000	4,300,000
Increase in valuation allowance		900,000
Percentage of cash savings in taxes realized as a result of utilizing net operating losses payable to pre-IPO stockholders	85.00%
TRA tax expense (benefit)		100,000	800,000	(5,600,000)
Payments to pre-IPO stockholders under TRA		5,764,000	7,272,000	11,109,000
Deferred tax asset credit		10,442,000	13,001,000
Unrecognized Tax Benefits, Interest on Income Taxes Accrued		0	0	0
Unrecognized Tax Benefits, Income Tax Penalties Accrued		0	0	$ 0
Federal
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards		8,600,000
State and Local Jurisdiction
Investments, Owned, Federal Income Tax Note [Line Items]
Net operating loss carryforwards		100,000
Enterprise Zone | State and Local Jurisdiction
Investments, Owned, Federal Income Tax Note [Line Items]
Tax credits carry forward		10,600,000
WOTC | Federal
Investments, Owned, Federal Income Tax Note [Line Items]
Tax credits carry forward		1,700,000
California | Enterprise Zone
Investments, Owned, Federal Income Tax Note [Line Items]
Deferred tax asset credit		$ 3,300,000	$ 4,400,000