Cash, Cash Equivalents and Restricted Cash (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020	Mar. 31, 2020	Sep. 30, 2019
Cash and Cash Equivalents [Abstract]
Cash	$ 14,662	$ 11,325	$ 2,985
Cash equivalents	49,066	19,065	19,045
Restricted cash	1,553	148	60
Total cash, cash equivalents and restricted cash	$ 65,281	$ 30,538	$ 22,090	$ 21,977