Commitments and Contingencies - Defined Contribution Plan (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended
Jan. 31, 2018
Mar. 31, 2021
Mar. 31, 2020
Commitments and Contingencies      
Employer matching contribution (as a percent) 50.00%    
Company matching contribution   $ 0.3 $ 0.3
Maximum      
Commitments and Contingencies      
Percentage of employee's gross pay match 6.00%