Net Loss per Share of Common Stock - Reconciliation of the numerators and denominators used in calculating basic and diluted net loss per share of common stock (Details) - USD ($) shares in Thousands, $ in Thousands |
12 Months Ended | ||
|---|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
|
| Numerator [Abstract] | |||
| Net loss, Basic | $ (20,606) | $ (38,301) | $ (124,058) |
| Adjustment for revaluation of contingent warrant liabilities | (39,512) | ||
| Net loss, Diluted | $ (20,606) | $ (77,813) | $ (124,058) |
| Denominator [Abstract] | |||
| Weighted average shares outstanding used for basic net loss per share (in shares) | 117,803 | 107,435 | 86,938 |
| Effect of dilutive warrants (in shares) | 7,898 | ||
| Weighted average shares outstanding and dilutive securities used for diluted net loss per share (in shares) | 117,803 | 115,333 | 86,938 |
| X | ||||||||||
- Definition Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of call options and warrants using the treasury stock method. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period). Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Net Income or Loss Available to Common Stockholders plus adjustments resulting from the assumption that dilutive convertible securities were converted, options or warrants were exercised, or that other shares were issued upon the satisfaction of certain conditions. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Definition Amount of increase (decrease) to net income used for calculating diluted earnings per share (EPS), resulting from the revaluation of contingent warrant liabilities. No definition available.
|