Summary of Significant Accounting Policies (Tables)

12 Months Ended

Sep. 30, 2022

Accounting Policies [Abstract]

Schedule of realized gains (losses) on derivatives not designated as hedging instruments

	Fiscal Year Ended September 30,
	2022		2021		2020
Realized gains (losses) on derivatives not designated as hedging instruments	$	991	$	(7,781)	$	(2,671)

	Fiscal Year Ended September 30,
	2022		2021		2020
Realized gains (losses) on derivatives not designated as hedging instruments	$	991	$	(7,781)	$	(2,671)

Schedule of property, plant and equipment

Buildings	10 - 40 years
Computer equipment and software	3 - 7 years
Machinery and equipment	2 - 10 years
Furniture and fixtures	3 - 10 years

	September 30,
	2022		2021
Buildings, land, and land use right	$	29,581	$	4,987
Computer equipment and software		35,814		27,350
Machinery and equipment		90,700		77,217
Furniture and fixtures		5,806		2,516
Leasehold improvements		37,495		27,165
Capital projects in progress		36,644		52,435
Right-of-use Asset		2,476		2,252
		238,516		193,922
Less: accumulated depreciation and amortization		(84,046)		(63,203)
Property, plant and equipment, net	$	154,470	$	130,719

Schedule of intangible assets

Trademarks	3 - 13 years
Patents	7 years
Completed technology	7 - 20 years
Customer relationships	6 - 14 years

	September 30, 2022						September 30, 2021
			Accumulated		Net Book				Accumulated		Net Book
	Cost		Amortization		Value		Cost		Amortization		Value
Patents	$	1,225	$	1,106	$	119	$	1,242	$	1,002	$	240
Completed technology		99,525		37,991		61,534		75,527		32,383		43,144
Trademarks and trade names		400		41		359		424		33		391
Non-competition agreements		681		439		242		681		249		432
Customer relationships		246,949		130,802		116,147		253,486		111,159		142,327
Other intangibles		202		202		—		246		246		—
	$	348,982	$	170,581	$	178,401	$	331,606	$	145,072	$	186,534

Schedule of stock-based compensation expense

	Year Ended September 30,
	2022		2021		2020
Restricted stock units	$	10,597	$	18,923	$	9,907
Employee stock purchase plan		1,846		1,128		744
Total stock-based compensation expense	$	12,443	$	20,051	$	10,651

Summary of valuation assumptions for an employee stock purchase plan

	Year Ended September 30,
	2022		2021		2020
Risk-free interest rate	1.7	%	0.3	%	0.9	%
Volatility	49	%	53	%	58	%
Expected life	6 months		6 months		6 months
Dividend yield	—	%	0.6	%	1.1	%