Convertible Senior Notes - Conversion (Details) |
6 Months Ended |
|---|---|
|
Jun. 30, 2018
USD ($)
item
$ / shares
| |
| Convertible Senior Notes | |
| Ownership interest percentage | 50.00% |
| Closing price of the company's stock | $ / shares | $ 2.02 |
| Convertible Senior Notes | |
| Convertible Senior Notes | |
| Conversion ratio, principal amount | $ 1,000 |
| Conversion rates for the notes (in shares) | 436.3002 |
| Conversion price, per share | $ / shares | $ 2.29 |
| Trading days | item | 20 |
| Consecutive Trading days | item | 30 |
| Conversion price (as a percent) | 130.00% |
| Number of business days | 5 days |
| Number of consecutive trading days | 5 days |
| Principal amount (as a percent) | 98.00% |
| Principal amount of the repurchased Convertible Senior Notes(as a percent) | 100.00% |
| Effective interest rate (as a percent) | 16.00% |
| Transaction costs attributable to the liability component | $ 2,400,000 |
| Transaction costs attributable to the equity component | $ 1,700,000 |
| Remaining life of the Convertible Senior Notes | 57 days |