Debt - Schedule of Foreign Subsidiary Borrowings (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Line of Credit Facility [Line Items]
Less – current maturities	$ (9,828)	$ (7,144)
Total long-term debt	2,903	4,606
Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	7,101	5,759
Less – current maturities	(4,801)	(3,544)
Total long-term debt	2,300	2,215
Receivables pledged as collateral	1,547	1,859
Term loan | Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	3,391	2,670
Short-term borrowings | Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	1,991	2,620
Factor | Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	$ 1,719	$ 469