Stock-Based Compensation - Additional Information (Details)
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3 Months Ended |
9 Months Ended |
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Apr. 29, 2020
shares
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Sep. 30, 2020
USD ($)
shares
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Sep. 30, 2020
USD ($)
$ / shares
shares
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Sep. 30, 2019
USD ($)
$ / shares
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May 01, 2019
shares
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Oct. 07, 2016
shares
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Plan modification, incremental cost | $ |
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$ 2,600,000
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| Restricted stock awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Weighted average grant-date fair value (in dollars per share) | $ / shares |
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$ 1.10
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$ 6.70
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| Fair value of vested restricted stock awards | $ |
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$ 16,100,000
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$ 9,100,000
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| Unrecognized compensation costs | $ |
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24,200,000
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$ 24,200,000
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| Unrecognized compensation costs, period for recognition |
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2 years 1 month 6 days
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| Granted (in shares) | shares |
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9,657,211
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| Stock option awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation costs, period for recognition |
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1 year 3 months 18 days
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| Fair value of stock options vested | $ |
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$ 4,700,000
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4,400,000
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| Intrinsic value of options exercised | $ |
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0
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$ 0
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| Unrecognized compensation costs for stock options | $ |
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1,200,000
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$ 1,200,000
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| Performance stock units |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
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3 years
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| Weighted average grant-date fair value (in dollars per share) | $ / shares |
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$ 0
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| Unrecognized compensation costs | $ |
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3,100,000
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$ 3,100,000
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| Unrecognized compensation costs, period for recognition |
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1 year 4 months 24 days
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| Granted (in shares) | shares |
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0
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| Cash-settled Restricted Stock |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation costs | $ |
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$ 2,500,000
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$ 2,500,000
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| Unrecognized compensation costs, period for recognition |
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2 years 10 months 24 days
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| Granted (in shares) | shares |
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5,500,000
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| Cash-settled Performance Stock |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Unrecognized compensation costs | $ |
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$ 3,100,000
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$ 3,100,000
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| Unrecognized compensation costs, period for recognition |
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2 years 9 months
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| Granted (in shares) | shares |
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5,500,000
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| 2016 Long Term Incentive Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares authorized (in shares) | shares |
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16,500,000
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| Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized | shares |
8,250,000
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| Number of shares available for grant (in shares) | shares |
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7,063,352
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7,063,352
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| 2016 Long Term Incentive Plan | Stock option awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
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3 years
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| Option expiration period |
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10 years
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| 2019 Employee Stock Purchase Plan |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Number of shares authorized (in shares) | shares |
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2,000,000
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| Number of shares available for grant (in shares) | shares |
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1,837,381
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1,837,381
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| Officer and employees | Restricted stock awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
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3 years
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| Director | Restricted stock awards |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Vesting period |
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1 year
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| Maximum | Cash-settled Restricted Stock |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award rights, percentage return |
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4
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| Minimum | Cash-settled Restricted Stock |
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| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
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| Award rights, percentage return |
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0.25
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