Income Taxes - Schedule of Calculation of the Effective Tax Rate (Details) - USD ($) $ in Thousands	3 Months Ended						9 Months Ended
	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2021	Jun. 30, 2020
Income Tax Disclosure [Abstract]
Income (loss) before income taxes	$ (1,338)			$ 2,922			$ (2,767)	$ 15,810
Income tax provision (benefit)	703			(559)			(138)	2,133
Net income (loss)	$ (2,041)	$ (225)	$ (364)	$ 3,481	$ 7,421	$ 2,775	$ (2,629)	$ 13,677
Effective tax rate	(53.00%)			(19.00%)			5.00%	13.00%