Schedule II - Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2020
Allowance for Doubtful Accounts [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	$ 1,078	$ 513	$ 537
Charged to Costs and Expenses	946	583	34
Deductions	(662)	(34)	(75)
Other	(37)	16	17
Balance at End of Period	1,325	1,078	513
Inventory Realizability Reserves [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	4,997	3,629	2,441
Charged to Costs and Expenses	5,121	2,703	1,775
Deductions	(3,882)	(1,297)	(564)
Other	(104)	(38)	(23)
Balance at End of Period	6,132	4,997	3,629
Valuation Allowances - Deferred Taxes [Member]
Valuation and Qualifying Accounts Disclosure [Line Items]
Balance at Beginning of Period	1,624	895	666
Charged to Costs and Expenses	666	729	335
Deductions	(760)	0	(106)
Other	(103)	0	0
Balance at End of Period	$ 1,427	$ 1,624	$ 895