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Income Taxes - Schedule of Components of Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Current:
Domestic federal	$ (239)		$ 1,167
Foreign	1,407	$ 1,278	(1,404)
Foreign withholding taxes	201	94	356
Domestic state	(59)	58	101
Total current	1,310	1,430	220
Deferred:
Foreign	(566)
Total deferred	(566)	0	0
Total provision	$ 744	$ 1,430	$ 220

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