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Common Stock and Stock-Based Compensation (Tables) | 6 Months Ended
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Jul. 01, 2023
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 31, 2022 |  |  | 204,245 |  |  | $ | 334.26 |  |  |  |  |  |  |  |
Granted |  |  | 51,278 |  |  |  | 324.78 |  |  |  |  |  |  |  |
Exercised |  |  | (43,481 | ) |  |  | 198.14 |  |  |  |  |  |  |  |
Forfeited |  |  | (5,756 | ) |  |  | 396.86 |  |  |  |  |  |  |  |
Outstanding at July 1, 2023 |  |  | 206,286 |  |  | $ | 358.85 |  |  |  | 6.25 |  |  | - |  | $ | 7,742 |
Exercisable at July 1, 2023 |  |  | 101,963 |  |  | $ | 299.46 |  |  |  | 4.75 |  |  |  | $ | 5,747 |
Vested and expected to vest at July 1, 2023 |  |  | 173,203 |  |  | $ | 350.05 |  |  |  | 5.91 |  |  |  | $ | 7,343 |
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:
|  | 2023 |
Expected Volatility |  |  | 39.6 | %
Risk-free interest rate |  |  | 3.8 | %
Expected Dividends |  |  | 0.0 | %
Exercise factor |  |  | 2.4 |
Discount for post-vesting restrictions |  |  | 0.6 | %
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 31, 2022 |  |  | 91,211 |  |  | $ | 410.22 |
Granted |  |  | 61,285 |  |  |  | 303.89 |
Vested |  |  | (27,569 | ) |  |  | 341.73 |
Forfeited |  |  | (12,748 | ) |  |  | 367.63 |
Non-vested at July 1, 2023 |  |  | 112,179 |  |  | $ | 373.80 |
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 |
|  | July 1, 2023 |  |  | June 25, 2022 |  |  | July 1, 2023 |  |  | June 25, 2022 |
|  | (in thousands) |  |  | (in thousands) |
Amounts included in advertising, promotional and selling expenses |  | $ | 1,539 |  |  | $ | 1,494 |  |  | $ | 3,582 |  |  | $ | 2,721 |
Amounts included in general and administrative expenses |  |  | 2,654 |  |  |  | 3,314 |  |  |  | 4,684 |  |  |  | 5,009 |
Total stock-based compensation expense |  | $ | 4,193 |  |  | $ | 4,808 |  |  | $ | 8,266 |  |  | $ | 7,730 |

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- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Subparagraph (f)(2) -Name Accounting Standards Codification -Paragraph 2 -Section 50 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480429/718-10-50-2 + Details
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- Definition Disclosure of the number and weighted-average grant date fair value for restricted stock and restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock and restricted stock units that were granted, vested, or forfeited during the year. + References No definition available. + Details
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