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Stock-Based Compensation | 12 Months Ended
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Sep. 30, 2023
Share-Based Payment Arrangement [Abstract] |
Stock-Based Compensation | 14. STOCK-BASED COMPENSATION: We account for our stock-based compensation plans following the provisions of FASB ASC 718, “Compensation — Stock Compensation” (“ASC 718”). In accordance with ASC 718, we use the Black-Scholes valuation model for valuing all options granted (Note 16) and shares purchased under our Amended 2008 Employee Stock Purchase Plan (“Stock Purchase Plan”). We measure compensation for restricted stock awards and restricted stock units (Note 17) at fair value on the grant date based on the number of shares expected to vest and the quoted market price of our common stock. We recognize compensation cost for all awards in operations on a straight-line basis over the requisite service period for each separately vesting portion of the award. Stock-based compensation expense recorded in selling, general, and administrative expenses was approximately $9.7 million, $16.0 million, and $21.7 million, for the fiscal years ended September 30, 2021, 2022, and 2023, respectively. Cash received from option exercises under all share-based compensation arrangements for the fiscal years ended September 30, 2021, 2022 and 2023 was approximately $2.6 million, $2.2 million, and $2.4 million, respectively. We currently expect to satisfy share-based awards with registered shares available to be issued from the Stock Purchase Plan.

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