Leases (Details Textual) - Office Leases With Renewal Options Not Reasonably Certain to Exercise  | 
Sep. 30, 2021  | 
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| Minimum | |
| Lessee, Lease, Description [Line Items] | |
| Lessee, Operating Lease, Renewal Term (Year) | 1 year | 
| Maximum | |
| Lessee, Lease, Description [Line Items] | |
| Lessee, Operating Lease, Renewal Term (Year) | 5 years | 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Definition Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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