Credit Losses - Summary of Change in Allowance for Credit Losses (Details) $ in Thousands	3 Months Ended
	Dec. 31, 2020 USD ($)
Receivables [Abstract]
Beginning balance	$ (1,394)
Current period recovery for expected credit losses	483
Write-offs charged against the allowance for expected credit losses	(73)
Foreign exchange impact on ending balance	18
Ending balance	$ (966)