Summary of Significant Accounting Policies - Revenue Recognition (Details) |
6 Months Ended |
|---|---|
Jun. 30, 2021 | |
| Summary of Significant Accounting Policies | |
| Notice in days for cancellation of contract | 30 days |
| X | ||||||||||
- 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.
|
| X | ||||||||||
- References No definition available.
|