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Share-Based Compensation (Tables)

3 Months Ended

Dec. 31, 2021

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
			December 31, 2021						January 1, 2021
Cost of revenue			$	1,033					$	871
Research and development			3,599						3,554
Selling, general and administrative			5,317						5,706
Total share-based compensation expense			$	9,949					$	10,131

Summary of Restricted Stock, Restricted Stock Unit and Performance-based Restricted Stock Unit Activity

A summary of stock award activity for the three months ended December 31, 2021 is as follows:

			Number of shares (in thousands)						Weighted- Average Grant Date Fair Value
Balance as of October 1, 2021			2,351						$	24.57
Granted			913						53.08
Vested and released			(969)						22.99
Forfeited, canceled or expired			(40)						27.54
Balance as of December 31, 2021			2,255						$	36.73

Schedule of Share-Based Payment Award, Market Based Restricted Stock Awards, Valuation Assumptions

The significant assumptions used in the Monte Carlo simulation to calculate the fair value of these market-based PRSUs are as follows:

			Three Months Ended
			December 31, 2021
Grant date stock price			$	66.12
Average stock price at the start of the performance period			$	64.11
Risk free interest rate			0.8		%
Years to maturity			3.00
Expected volatility rate			57.8		%
Expected dividend yield			—

Share-based Payment Arrangement, Option, Activity

A summary of stock option activity for the three months ended December 31, 2021 is as follows (in thousands, except per share amounts and contractual term):

			Number of Shares						Weighted-Average Exercise Price per Share						Weighted-Average Remaining Contractual Term (in Years)						Aggregate Intrinsic Value
Options outstanding as of October 1, 2021			205						$	14.29
Exercised			(190)						14.15
Forfeited, canceled or expired			—						—
Options outstanding as of December 31, 2021			15						$	16.06					3.85						$	934
Options vested and exercisable as of December 31, 2021			15						16.06						3.85						934

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Schedule of Share-Based Payment Award, Market Based Restricted Stock Awards, Valuation Assumptions

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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.

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Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value.

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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.

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