Debt - Schedule of Foreign Subsidiary Borrowings (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Line of Credit Facility [Line Items]
Less – current maturities	$ (9,783)	$ (7,144)
Total long-term debt	2,542	4,606
Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	6,623	5,759
Less – current maturities	(4,743)	(3,544)
Total long-term debt	1,880	2,215
Receivables pledged as collateral	2,343	1,859
Term loan | Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	2,661	2,670
Short-term borrowings | Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	2,147	2,620
Factor | Foreign subsidiary borrowings
Line of Credit Facility [Line Items]
Total debt	$ 1,815	$ 469