Certain Balance Sheet Accounts - Property and Equipment, Net (Details) - USD ($) $ in Thousands |
3 Months Ended | ||
|---|---|---|---|
Mar. 31, 2023 |
Mar. 31, 2022 |
Dec. 31, 2022 |
|
| Property, Plant and Equipment [Line Items] | |||
| Total cost | $ 10,842 | $ 11,040 | |
| Less accumulated depreciation and amortization | (9,507) | (9,548) | |
| Total property and equipment, net | 1,335 | 1,492 | |
| Depreciation and amortization | 186 | $ 278 | |
| Equipment under finance lease obligations | |||
| Property, Plant and Equipment [Line Items] | |||
| Total cost | 5,977 | 6,204 | |
| Laboratory equipment | |||
| Property, Plant and Equipment [Line Items] | |||
| Total cost | 3,164 | 3,135 | |
| Computer equipment | |||
| Property, Plant and Equipment [Line Items] | |||
| Total cost | 1,076 | 1,076 | |
| Office equipment and furniture | |||
| Property, Plant and Equipment [Line Items] | |||
| Total cost | $ 625 | $ 625 | |