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Commitments and Contingencies - Defined Contribution Plan (Details) - USD ($)
$ in Millions
 1 Months Ended 12 Months Ended
Jan. 31, 2018
Dec. 31, 2019
Dec. 31, 2018
Other Commitments [Line Items]      
Employer matching contribution (as a percent) 50.00%    
Company matching contribution   $ 0.6 $ 0.2
Maximum      
Other Commitments [Line Items]      
Maximum employee contribution 6.00%