Other Payables and Accrued Expenses (Details) - USD ($) $ in Thousands	Sep. 30, 2020	Sep. 30, 2019
Other Payables And Accrued Expenses [Abstract]
Payroll accrual	$ 10,691	$ 3,999
Sales taxes payable	3,101	1,870
Other payables and accrued expenses	4,644	4,784
Acquisition contingent consideration	5,520	0
Accrued interest	265	5,914
Total other payables and accrued expenses	$ 24,221	$ 16,567