Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Allowance For Doubtful Accounts On Accounts And Financing Receivables [Member]
Balance at beginning of period	$ 591	$ 428
Charged to costs and expenses, net of recoveries	(138)	292
Charged to other assets	0	0
(deductions) and additions	(328)	(129)
Balance at end of period	125	591
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance at beginning of period	13,971	13,636
Charged to costs and expenses, net of recoveries	2,229	3,222
Charged to other assets	0	0
(deductions) and additions	(2,139)	(2,887)
Balance at end of period	$ 14,061	$ 13,971