Leases - Summary of Undiscounted Future Minimum Lease Payments Under Non-cancelable Leases (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Operating Leases
2021 (excluding six months ended March 31, 2021)	$ 3,542
2022	6,207
2023	4,042
2024	3,711
2025	2,287
Thereafter	2,998
Total future minimum lease payments	22,787
Less effects of discounting	(3,198)
Total lease liabilities	19,589
Short-term lease liabilities	5,602	$ 5,700
Long-term lease liabilities	13,987	$ 17,821
Financing Leases
2021 (excluding six months ended March 31, 2021)	330
2022	417
2023	417
2024	365
2025	310
Thereafter	14
Total future minimum lease payments	1,853
Less effects of discounting	(177)
Total lease liabilities	1,676
Short-term lease liabilities	476
Long-term lease liabilities	1,200
Total
2021 (excluding six months ended March 31, 2021)	3,872
2022	6,624
2023	4,459
2024	4,076
2025	2,597
Thereafter	3,012
Total future minimum lease payments	24,640
Less effects of discounting	(3,375)
Total lease liabilities	21,265
Short-term lease liabilities	6,078
Long-term lease liabilities	$ 15,187