Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Inventory
Capitalized inventory costs	$ 0	$ 0
Laboratory equipment
Property and Equipment, Net
Expected useful life	5 years
Minimum | Computer hardware and software
Property and Equipment, Net
Expected useful life	3 years
Minimum | Furniture, fixtures, and vehicles
Property and Equipment, Net
Expected useful life	5 years
Maximum | Computer hardware and software
Property and Equipment, Net
Expected useful life	5 years
Maximum | Furniture, fixtures, and vehicles
Property and Equipment, Net
Expected useful life	7 years