Net Loss per Share - Loss per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2019 |
Sep. 30, 2019 |
Jun. 30, 2019 |
Mar. 31, 2019 |
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2019 |
Dec. 31, 2018 |
Dec. 31, 2017 |
|
| Numerator: | |||||||||||
| Net loss used to compute net loss per share, basic | $ (124,827) | $ (128,154) | $ (137,628) | ||||||||
| Less: Remeasurement gain on warrant liability | (1,148) | ||||||||||
| Net loss used to compute net loss per share, diluted | $ (124,827) | $ (128,154) | $ (138,776) | ||||||||
| Denominator: | |||||||||||
| Weighted-average number of shares used in computing net loss per share, basic | 69,555 | 57,848 | 53,312 | ||||||||
| Add: incremental shares from assumed exercise of warrants | 292 | ||||||||||
| Net loss per share, basic (in dollars per share) | $ (0.46) | $ (0.33) | $ (0.48) | $ (0.54) | $ (0.51) | $ (0.49) | $ (0.62) | $ (0.61) | $ (1.79) | $ (2.22) | $ (2.58) |
| Net loss per share, diluted (in dollars per share) | $ (0.46) | $ (0.33) | $ (0.48) | $ (0.54) | $ (0.51) | $ (0.49) | $ (0.62) | $ (0.61) | $ (1.79) | $ (2.22) | $ (2.59) |
| X | ||||||||||
- Definition Represents the remeasurement gain on warrant liability during the period. No definition available.
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- Definition The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period. Reference 1: http://www.xbrl.org/2003/role/exampleRef
|
| 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://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities; of income (loss) available to common shareholders. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Amount, after deduction of tax, noncontrolling interests, dividends on preferred stock and participating securities, and addition from assumption of issuance of common shares for dilutive potential common shares; of income (loss) available to common shareholders. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition This element represents the weighted average total number of shares issued throughout the period including the first (beginning balance outstanding) and last (ending balance outstanding) day of the period before considering any reductions (for instance, shares held in treasury) to arrive at the weighted average number of shares outstanding. Weighted average relates to the portion of time within a reporting period that common shares have been issued and outstanding to the total time in that period. Such concept is used in determining the weighted average number of shares outstanding for purposes of calculating earnings per share (basic). Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|