Leases - Narrative (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
Mar. 31, 2021 |
Mar. 31, 2020 |
Mar. 31, 2021 |
Mar. 31, 2020 |
Sep. 30, 2020 |
|
| Commitments and Contingencies Disclosure [Abstract] | |||||
| Operating lease right-of-use assets | $ 6,778 | $ 6,778 | $ 7,383 | ||
| Current portion of operating lease liabilities | 1,663 | 1,663 | 2,046 | ||
| Operating lease liabilities, net of current portion | $ 5,308 | $ 5,308 | $ 5,554 | ||
| Weighted-average remaining lease terms | 9 years 3 months 18 days | 9 years 3 months 18 days | |||
| Weighted-average discount rate | 3.96% | 3.96% | |||
| Royalty expense | $ 200 | $ 200 | $ 400 | $ 400 | |
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as current. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Present value of lessee's discounted obligation for lease payments from operating lease, classified as noncurrent. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Amount of lessee's right to use underlying asset under operating lease. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition Weighted average remaining lease term for operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| X | ||||||||||
- Definition Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|