Stock-based compensation expense (Tables)

12 Months Ended

Sep. 30, 2022

Share-based Payment Arrangement [Abstract]

Activity with respect to the Company’s restricted stock units during the year ended September 30, 2022 is as follows:


(In thousands, except per share data)	Shares	Weighted average grant date fair value per share








Nonvested shares at October 1, 2021	697	$	73.27
Granted	1,430	$	67.30
Vested/Issued	(377)	72.00
Forfeited	(184)	77.23
Nonvested shares at September 30, 2022	1,566	$	67.66

Summary of PSU Activity

Activity under the PSUs during the year ended September 30, 2022 is summarized below:


(In thousands, except per share data)	Shares	Weighted average grant date fair value per share








Nonvested shares at October 1, 2021	10	$	128.49
Granted	621	$	78.81
Vested/Issued	(14)	34.35
Forfeited	(88)	85.40
Nonvested shares at September 30, 2022	529	$	79.60

Schedule of Share-based Payment Arrangement, Option, Activity

Options activity during the year ended September 30, 2022 is summarized below:


(In thousands, except per share data)	Shares	Weighted average exercise price per share		Weighted average remaining contractual term (years)	Aggregate intrinsic value










Outstanding at October 1, 2021	2,875	$	22.83	7.11	$	242,291
Granted	223	$	24.03	9.21	$	—
Forfeited	(161)	35.79		—	—
Exercised	(484)	12.42		—	$	31,918

Outstanding at September 30, 2022	2,453	$	24.67	6.33	$	33,447
Nonvested at September 30, 2022	581	$	32.61	7.20	5,435
Exercisable	1,872	$	22.20	6.05	$	28,012

Activity under the PSOs during the year ended September 30, 2022 is summarized below:


(In thousands, except per share data)	Shares	Weighted average exercise price per share		Weighted average remaining contractual term (years)	Aggregate intrinsic value










Outstanding and nonvested at October 1, 2021	256	$	70.62	8.94	$	9,331
Granted	75	$	31.29	9.57	—
Forfeited	(19)	67.85		—	—


Vested	(19)	31.29		—	—

Nonvested at September 30, 2022	293	$	63.27	8.25	$	222
Exercisable	19	31.29		9.57	74
Outstanding at September 30, 2022	312	$	61.35	8.33	$	296

Summary of Weighted Average Valuation Assumptions

The fair value of options granted during the year ended September 30, 2022, were calculated using the weighted average assumptions set forth below:


	Year ended September 30,
	2022
Expected term (years)	6.0
Expected volatility	70.7	%
Risk-free interest rate	1.4	%
Dividend yield	—%

The fair value of options and performance stock options granted during the years ended September 30, 2021 and 2020, respectively, were calculated using the weighted average assumptions set forth below:


	Year ended September 30,
	2021		2020
Expected term (years)	6.1		6.2
Expected volatility	64.4	%	62.1	%
Risk-free interest rate	1.0	%	1.3	%
Dividend yield	—%		—%

The fair values of PSOs granted during the year ended September 30, 2022 respectively, were calculated using the weighted average assumptions set forth below:


						Year ended September 30,
						2022
Expected term (years)						5.9
Expected volatility						70.9%
Risk-free interest rate						2.8%
Dividend yield						—%

Schedule Of Stock-Based Compensation Expenses

Total stock-based compensation expense recognized were as follows:


	Year ended September 30,
(in thousands)	2022		2021		2020
Cost of revenues	$	4,587	$	2,678	$	1,290
Research and development	19,541		10,166		3,346
Selling, general and administrative	54,905		24,154		12,460
Total stock-based compensation	$	79,033	$	36,998	$	17,096

Schedule Of Shares Reserved For Issuance

The number of shares reserved for issuance as at September 30, 2022 is as follows:


(In thousands)						Shares available
Outstanding at September 30, 2021						355
Additional shares authorized						249
Shares issued during the period						(97)
Outstanding at September 30, 2022						507