Property and Equipment, Net (Details) - USD ($) $ in Thousands |
Dec. 31, 2020 |
Dec. 31, 2019 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, net | $ 37 | $ 37 |
| Accumulated depreciation and impairment | (25) | (20) |
| Total property and equipment, net | 12 | 17 |
| Computers [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, net | 10 | 10 |
| Furniture and office equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, net | 12 | 12 |
| Leasehold improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Property and equipment, net | $ 15 | $ 15 |