Debt and Subsequent Event - Foreign Subsidiary Borrowings (Details) - USD ($) $ in Thousands	Sep. 30, 2023	Sep. 30, 2022
Line of Credit Facility [Line Items]
Less – current maturities	$ (3,820)	$ (4,379)
Total long-term debt	2,457	3,508
Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	5,771	7,101
Less – current maturities	(3,386)	(4,078)
Total long-term debt	2,385	3,023
Receivables pledged as collateral	1,247	792
Foreign subsidiary borrowings | Term loan
Line of Credit Facility [Line Items]
Total debt	3,293	3,818
Foreign subsidiary borrowings | Short-term borrowings
Line of Credit Facility [Line Items]
Total debt	1,862	2,289
Foreign subsidiary borrowings | Factor
Line of Credit Facility [Line Items]
Total debt	$ 616	$ 994