Convertible Senior Notes - Capped Call and Common Stock Forward (Details) $ / shares in Units, $ in Millions |
6 Months Ended |
|---|---|
|
Jun. 30, 2018
USD ($)
$ / shares
shares
| |
| Capped Call and Common Stock Forward | |
| Share Price | $ 2.02 |
| Capped Call | |
| Capped Call and Common Stock Forward | |
| Capped call options amount | $ | $ 16.0 |
| Cap price | $ 3.82 |
| Premium (as a percent) | 100.00% |
| Share Price | $ 1.91 |
| Common Stock Forward | |
| Capped Call and Common Stock Forward | |
| Purchase of common stock forward ( in shares) | shares | 14,397,906 |
| Net cost incurred | $ | $ 27.5 |