Stock-Based Compensation (Details) - USD ($) | 1 Months Ended | 3 Months Ended | 6 Months Ended |
May 31, 2019 | Mar. 31, 2020 | Jun. 30, 2020 | Jun. 30, 2019 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, number of additional shares authorized (in shares) | 2,542,664 | | | |
Share-based compensation, number of shares authorized (in shares) | | | 30,944,912 | |
Share-based compensation, number of shares available for grant (in shares) | | | 11,791,808 | |
Share-based compensation, reduction in shares available for issuance by shares issued pursuant to any appreciation award (in shares) | | | 1 | |
Share-based compensation, strike price as a percentage of the fair market value of the underlying stock on the date of grant | | | 100.00% | |
Share-based compensation, reduction in shares available for issuance by shares issued pursuant to any stock award that is not an appreciation award (in shares) | | | 1.8 | |
Employee Stock Option | Share-based Payment Arrangement, Employee [Member] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, term of award | | | 10 years | 10 years |
Share-based compensation, vesting period | | | 4 years | 4 years |
Share-based compensation, options granted (in shares) | | | 0 | 139,000 |
Share-based compensation, grant date fair value of stock options | | | $ 0 | $ 1,300,000 |
Employee Stock Option | Share-based Payment Arrangement, Employee [Member] | Vesting on first anniversary of grant date | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 25.00% | 25.00% |
Employee Stock Option | Share-based Payment Arrangement, Employee [Member] | Vesting on the last day of each calendar quarter | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 6.25% | 6.25% |
Restricted Stock Units (RSUs) [Member] | Vesting on the last day of each calendar quarter | Maximum | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 150.00% | 150.00% |
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Nonemployee [Member] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, grant date fair value of stock options | | | $ 0 | $ 200,000 |
Share-based compensation, restricted stock units granted (in shares) | | | 0 | 11,000 |
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Nonemployee [Member] | Vesting on first anniversary of grant date | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 50.00% | 50.00% |
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Nonemployee [Member] | Vesting on the last day of each calendar quarter | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 12.50% | 12.50% |
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Employee [Member] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting period | | | 4 years | 4 years |
Share-based compensation, grant date fair value of stock options | | | $ 18,300,000 | $ 15,000,000 |
Share-based compensation, restricted stock units granted (in shares) | | | 683,000 | 651,000 |
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Employee [Member] | Vesting on first anniversary of grant date | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 25.00% | 25.00% |
Restricted Stock Units (RSUs) [Member] | Share-based Payment Arrangement, Employee [Member] | Vesting on the last day of each calendar quarter | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 6.25% | 6.25% |
Restricted Stock Units (RSUs) [Member] | Director | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, grant date fair value of stock options | | | $ 1,400,000 | $ 1,400,000 |
Share-based compensation, restricted stock units granted (in shares) | | | 58,000 | 76,000 |
Share Based Compensation Arrangement By Share Based Payment Award Ratably Vest After | | | 100.00% | 100.00% |
Performance Based RSU | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting period | | | 1 year | 1 year |
Share-based compensation, grant date fair value of stock options | | | $ 3,100,000 | $ 2,900,000 |
Performance Based RSU | Share-based Payment Arrangement, Employee [Member] | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, restricted stock units granted (in shares) | | | 115,000 | 125,000 |
Performance Based RSU | Executives | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting period | | | 3 years | 3 years |
Share-based compensation, grant date fair value of stock options | | | $ 3,900,000 | $ 2,200,000 |
Share-based compensation, restricted stock units granted (in shares) | | | 144,000 | 96,000 |
Share-based Compensation Arrangement by Share-based Payment Award, Accelerated Vesting, Number | | 20,000 | | |
Share-based Compensation Arrangement by Share-based Payment Award, Award Performance Period | | | 2 years | 2 years |
Performance Based RSU | Executives | Minimum | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 0.00% | 0.00% |
Performance Based RSU | Executives | Vesting on first anniversary of grant date | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 50.00% | 50.00% |
Performance Based RSU | Executives | Vesting on the last day of each calendar quarter | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | | | | |
Share-based compensation, vesting percentage, year one | | | 50.00% | 50.00% |