Property and Equipment (Details) - USD ($)
$ in Thousands |
12 Months Ended |
|
Dec. 31, 2021 |
Dec. 31, 2020 |
| Property, Plant and Equipment [Line Items] |
|
|
| Property, Plant and Equipment, Gross |
$ 1,099
|
$ 1,029
|
| Less accumulated depreciation |
(874)
|
(798)
|
| Net property and equipment |
225
|
231
|
| Leasehold improvements |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Property, Plant and Equipment, Gross |
$ 463
|
463
|
| Leasehold improvements | Minimum [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Property, plant and equipment, useful life |
2 years
|
|
| Leasehold improvements | Maximum [Member] |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Property, plant and equipment, useful life |
5 years
|
|
| Computer and office equipment |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Property, plant and equipment, useful life |
3 years
|
|
| Property, Plant and Equipment, Gross |
$ 83
|
60
|
| Furniture and fixtures |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Property, plant and equipment, useful life |
7 years
|
|
| Property, Plant and Equipment, Gross |
$ 93
|
46
|
| Scientific equipment |
|
|
| Property, Plant and Equipment [Line Items] |
|
|
| Property, plant and equipment, useful life |
7 years
|
|
| Property, Plant and Equipment, Gross |
$ 460
|
$ 460
|