Summary of Significant Accounting Policies - Recent Accounting Pronouncements (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit	$ 381,187		$ 243,299
Cumulative Effect, Period of Adoption, Adjustment
Revenue, Initial Application Period Cumulative Effect Transition [Line Items]
Accumulated deficit		$ 300