Summary of Significant Accounting Policies - Estimated useful life (Details) |
12 Months Ended |
|---|---|
Dec. 31, 2019 | |
| Laboratory equipment | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 5 years |
| Computers and software | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 3 years |
| Furniture and fixtures | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 7 years |
| Building | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 30 years |
| Leasehold improvements | |
| Property, Plant and Equipment [Line Items] | |
| Estimated useful life | 10 years |