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Commitments and contingencies (Tables) | 12 Months Ended
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Sep. 30, 2021
Commitments and contingencies |
Schedule of Supplemental Balance Sheet Information Relating to Companies Operating Lease | Supplemental balance sheet information related to the Company’s operating lease as of September 30, 2021, was the following: ​
​ | ​ | ​ | ​
​ | ​ | September 30,
(in thousands) |  | 2021
Assets: | ​ | ​ | ​
Operating lease right-of-use-asset | ​ | $ | 61,580
Current liabilities: | ​ | ​ | ​
Current portion of operating lease liabilities | ​ | $ | 8,213
Noncurrent liabilities: | ​ | ​ | ​
Operating lease liabilities, net of current portion | ​ | $ | 53,156
Schedule of Future Minimum Rental Payments for Operating Leases | Future minimum lease payments under all non-cancelable operating leases as of September 30, 2021 are as follows: ​
​ | ​ | ​ | ​
​ | ​ | Operating
(in thousands) |  | leases
Years ending September 30: | ​ | ​ | ​
2022 | ​ | $ | 8,986
2023 | ​ |  | 10,595
2024 | ​ |  | 10,333
2025 | ​ |  | 10,489
2026 | ​ |  | 9,083
Thereafter | ​ |  | 84,753
Total minimum lease payments | ​ | $ | 134,239
​ | ​ | ​ | ​
Less: imputed interest | ​ |  | (55,242)
Less: tenant improvement allowance (receipt anticipated in 2022) | ​ |  | (17,628)
Total operating lease liabilities | ​ | $ | 61,369
Less: current portion | ​ |  | (8,213)
Operating lease liabilities, net of current portion | ​ | $ | 53,156

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- Definition Tabular disclosure of undiscounted cash flows of lessee's operating lease liability. Includes, but is not limited to, reconciliation of undiscounted cash flows to operating lease liability recognized in statement of financial position. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918701-209980 + Details
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