Schedule of Property and Equipment (Details) - USD ($) $ in Thousands |
Dec. 31, 2022 |
Dec. 31, 2021 |
|---|---|---|
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | $ 2,983 | $ 2,961 |
| Less accumulated depreciation and amortization | (2,748) | (2,640) |
| Property and equipment, net | 235 | 321 |
| Laboratory Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 1,827 | 1,838 |
| Leasehold Improvements [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 664 | 602 |
| Computer Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | 275 | 304 |
| Office Furniture And Equipment [Member] | ||
| Property, Plant and Equipment [Line Items] | ||
| Total property and equipment | $ 217 | $ 217 |