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STOCKHOLDERS’ EQUITY AND SHARE-BASED COMPENSATION (Tables) | 6 Months Ended
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Mar. 29, 2024
Share-Based Payment Arrangement [Abstract] |
Effects of Stock-Based Compensation Expense Related to Stock-Based Awards to Employees and Nonemployees | The following table shows a summary of share-based compensation expense included in the condensed consolidated statements of operations (in thousands):
| Three Months Ended |  | Six Months Ended
| March 29, 2024 |  | March 31, 2023 |  | March 29, 2024 |  | March 31, 2023
Cost of revenue | $ | 1,600 |  |  | $ | 1,011 |  |  | $ | 2,870 |  |  | $ | 2,161 |
Research and development | 4,962 |  |  | 3,742 |  |  | 7,727 |  |  | 7,974 |
Selling, general and administrative | 5,528 |  |  | 4,707 |  |  | 10,150 |  |  | 10,372 |
Total share-based compensation expense | $ | 12,090 |  |  | $ | 9,460 |  |  | $ | 20,747 |  |  | $ | 20,507 |
Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity | A summary of stock award activity for the six months ended March 29, 2024 is as follows:
| Number of shares (in thousands) |  | Weighted- Average Grant Date Fair Value
Balance as of September 29, 2023 | 1,501 |  |  | $ | 60.90 |
Granted | 715 |  |  | 78.62 |
Performance-based adjustment (1) | 62 |  |  | 35.43 |
Vested and released | (502) |  |  | 50.11 |
Forfeited, canceled or expired | (100) |  |  | 65.07 |
Balance as of March 29, 2024 | 1,676 |  |  | $ | 70.51 |
(1) The amount shown represents performance adjustments for performance-based awards. These were granted in prior fiscal years and vested during the six months ended March 29, 2024 based on the Company’s achievement of adjusted earnings per share performance conditions.
Schedule of Share-Based Payment Award, Market Based Restricted Stock Awards, Valuation Assumptions | The assumptions used to value the awards are as follows:
| Six Months Ended
| March 29, 2024
Grant date stock price | $ | 73.01
Average stock price at the start of the performance period | $ | 79.43
Risk free interest rate | 4.6%
Years to maturity | 2.9
Expected volatility rate | 41.7%
Expected dividend yield | —

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- Definition Schedule of Share-Based Payment Award, Market Based Restricted Stock Awards, Valuation Assumptions + References No definition available. + Details
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- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -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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