Income Taxes - Components of the Provision for (Benefit from) Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021
Income Tax Disclosure [Abstract]
Domestic	$ 233	$ 4,191	$ 1,670	$ 3,753
Foreign	3,212	2,025	2,074	(6,952)
Provision for (benefit from) income taxes	$ 3,445	$ 6,216	$ 3,744	$ (3,199)
Effective income tax rate	116.00%	35.80%	16.80%	(11.10%)