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Convertible Senior Notes - Capped Call and Common Stock Forward (Details) - USD ($) $ / shares in Units, $ in Thousands |  | 1 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | --- | ---
May 18, 2020 | May 31, 2020 | Mar. 31, 2019 | Jun. 30, 2020 | May 29, 2020 | Dec. 31, 2019 | Sep. 30, 2019 | Mar. 31, 2018
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Share Price |  |  | $ 2.35 |  |  |  |  |
Common stock shares issued |  |  | 10,000,000 |  |  |  |  |
Capped Call |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Capped call options amount |  |  |  |  |  |  | $ 16,000 |
Common Stock Forward |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Common stock shares issued |  |  |  | 14,397,906 |  |  |  |
3.75% Convertible Senior Notes |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Principal amount | $ 200,000 |  |  | $ 212,463 | $ 12,500 |  |  |
Share Price |  |  |  | $ 8.21 |  |  |  |
3.75% Convertible Senior Notes | Capped Call |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Capped call options amount | $ 16,200 |  |  |  |  |  |  |
Cap price | $ 6.7560 |  |  |  |  |  |  |
Premium (as a percent) | 60.00% |  |  |  |  |  |  |
Share Price | $ 4.11 |  |  |  |  |  |  |
5.5% Convertible Senior Notes |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Principal amount | $ 100,000 | $ 1,000 |  | $ 33,660 |  | $ 100,000 |  | $ 100,000
Share Price |  |  |  | $ 8.21 |  |  |  |
5.5% Convertible Senior Notes | Capped Call |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Cap price |  | $ 3.82 |  |  |  |  |  |
Premium (as a percent) |  | 100.00% |  |  |  |  |  |
Share Price |  | $ 1.91 |  |  |  |  |  |
Recorded in additional paid-in capital |  | $ 24,200 |  |  |  |  |  |
7.5% Convertible Senior Note |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Principal amount |  | $ 100,000 |  | $ 48,000 |  | $ 48,000 | $ 40,000 |
Share Price |  |  |  | $ 8.21 |  |  |  |
7.5% Convertible Senior Note | Common Stock Forward |  |  |  |  |  |  |  |
Capped Call and Common Stock Forward |  |  |  |  |  |  |  |
Net cost incurred |  |  |  | $ 27,500 |  |  |  |

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