Condensed Consolidated Statements of Operations and Comprehensive Loss (Parenthetical) - USD ($) |
9 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Sep. 30, 2021 |
Sep. 30, 2020 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|
| Income Statement [Abstract] | ||||
| (Loss)/gain on disposal of discontinued operations | $ (1,022,000) | $ 30,672,000 | $ 30,672 | $ 0 |
| X | ||||||||||
- Definition Amount of gain (loss) on sale or disposal of assets, including but not limited to property plant and equipment, intangible assets and equity in securities of subsidiaries or equity method investee. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- References No definition available.
|