| Leases (Details 1) | 3 Months Ended | 12 Months Ended | 
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| Dec. 31, 2021 | Sep. 30, 2021 | |
| Leases | ||
| Weighted average remaining lease term for operating leases | 2 years 4 months 24 days | 2 years 8 months 12 days | 
| Weighted average discount rate for operating leases | 5.90% | 5.90% | 
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- 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. No definition available. 
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- References No definition available. 
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- Definition Weighted average discount rate for operating lease calculated at point in time. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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