Summary of Significant Accounting Policies - Revenue Recognition (Details) |
9 Months Ended |
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Sep. 30, 2021 | |
| Summary of Significant Accounting Policies | |
| Notice in days for cancellation of contract | 30 days |
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- Definition The notice period for cancellation of contract, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. No definition available.
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| X | ||||||||||
- References No definition available.
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