SELECTED QUARTERLY FINANCIAL DATA (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands |
3 Months Ended | 12 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Dec. 31, 2018 |
Sep. 30, 2018 |
Jun. 30, 2018 |
Mar. 31, 2018 |
Dec. 31, 2017 |
Sep. 30, 2017 |
Jun. 30, 2017 |
Mar. 31, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
| SELECTED QUARTERLY FINANCIAL DATA | |||||||||||
| Revenue | $ 37,857 | $ 4,865 | $ 1,787 | $ 900 | $ 3,584 | $ 44,509 | $ 4,484 | $ 20,383 | |||
| Gross profit | 7,107 | 4,796 | 1,757 | ||||||||
| Net loss | $ 3,228 | $ (23,766) | $ (25,557) | $ (24,385) | $ (25,871) | $ (17,660) | $ (19,147) | $ (15,314) | $ (70,480) | $ (77,992) | $ (69,216) |
| Net income (loss) per share: | |||||||||||
| Basic and diluted (in dollars per share) | $ 0.02 | $ (0.14) | $ (0.16) | $ (0.17) | $ (0.18) | $ (0.14) | $ (0.16) | $ (0.13) | $ (0.44) | $ (0.62) | $ (0.73) |
| Weighted average shares used in computing net income (loss) per share: | |||||||||||
| Basic (in shares) | 166,680 | 166,464 | 161,577 | 147,114 | 144,252 | 124,628 | 122,500 | 113,598 | |||
| Diluted (in shares) | 167,617 | 166,464 | 161,577 | 147,114 | 144,252 | 124,628 | 122,500 | 113,598 | |||
| X | ||||||||||
- Definition The amount of net income or loss for the period per each share in instances when basic and diluted earnings per share are the same amount and reported as a single line item on the face of the financial statements. Basic earnings per share is the amount of net income or loss for the period per each share of common stock or unit outstanding during the reporting period. Diluted earnings per share includes the amount of net income or 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. No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- References No definition available.
|
| X | ||||||||||
- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| 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/presentationRef
|
| X | ||||||||||
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. 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 | ||||||||||
- 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
|