Common Stock and Stock-Based Compensation (Tables)

6 Months Ended

Jun. 25, 2022

Share-based Payment Arrangement [Abstract]

Summary of Stock Options under Employee Equity Incentive Plan and Stock Option Plan for Non-Employee Directors

Information related to stock options under the Restated Employee Equity Incentive Plan and the Stock Option Plan for Non-Employee Directors is summarized as follows:

	Shares			Weighted- Average Exercise Price		Weighted- Average Remaining Contractual Term in Years		Aggregate Intrinsic Value (in thousands)
Outstanding at December 25, 2021		221,354		$	310.38
Granted		20,924			378.55
Exercised		(17,592	)		193.12
Forfeited		(6,457	)		299.16
Outstanding at June 25, 2022		218,229		$	326.70		5.61	$	19,011
Exercisable at June 25, 2022		115,834		$	250.18		4.94	$	12,577
Vested and expected to vest at June 25, 2022		198,774		$	318.23		5.53	$	17,789

Weighted Average Assumptions used to Estimate Fair Value of Stock Options

Weighted average assumptions used to estimate fair values of stock options on the date of grants are as follows:

	2022
Expected Volatility		38.0	%
Risk-free interest rate		2.1	%
Expected Dividends		0.0	%
Exercise factor	3
Discount for post-vesting restrictions		0.8	%

Summary of Vesting Activities of Shares Issued Under Investment Share Program and Restricted Stock Awards

The following table summarizes vesting activities of shares issued under the investment share program and restricted stock awards:

	Number of Shares			Weighted Average Fair Value
Non-vested at December 25, 2021		88,848		$	401.70
Granted		42,560			344.62
Vested		(32,081	)		293.84
Forfeited		(6,092	)		545.46
Non-vested at June 25, 2022		93,235		$	409.29

Stock-Based Compensation Expense Included in Operating Expenses

The following table provides information regarding stock-based compensation expense included in operating expenses in the accompanying condensed consolidated statements of comprehensive operations:

	Thirteen weeks ended				Twenty-six weeks ended
	June 25, 2022		June 26, 2021		June 25, 2022		June 26, 2021
	(in thousands)				(in thousands)
Amounts included in advertising, promotional and selling expenses	$	1,494	$	1,268	$	2,721	$	2,940
Amounts included in general and administrative expenses		3,314		4,066		5,009		7,351
Total stock-based compensation expense	$	4,808	$	5,334	$	7,730	$	10,291