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Stock-Based Compensation - Restricted Stock Unit (Details) - Restricted stock units
12 Months Ended
Dec. 31, 2019
$ / shares
shares
Restricted Stock Units  
Unvested and outstanding, beginning balance (in shares) | shares 0
RSUs granted | shares 504,361
RSUs forfeited | shares (500)
Unvested and outstanding, ending balance (in shares) | shares 503,861
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]  
Unvested and outstanding, beginning balance (in USD per share) | $ / shares $ 0
RSUs granted | $ / shares 37.57
RSUs forfeited | $ / shares 44.43
Unvested and outstanding, ending balance (in USD per share) | $ / shares $ 37.57