Certain Balance Sheet Items (Details) - Schedule of other current assets - USD ($) $ in Thousands |
Sep. 30, 2021 |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|---|
| Schedule of other current assets [Abstract] | |||
| Prepaid services | $ 1,037 | $ 421 | $ 23 |
| Prepaid insurance | 484 | 158 | 184 |
| Transition service agreement, related party | 115 | 345 | |
| Deferred cost – service contracts | 99 | 118 | |
| Other | 103 | 14 | |
| Total other current assets | $ 1,686 | $ 807 | $ 670 |