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NET LOSS PER SHARE (Details) - USD ($) $ / shares in Units, $ 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
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |  |  |  |  |  |  |  |
Net loss | $ (25,132) | $ (11,465) | $ (13,014) | $ (10,136) | $ (20,989) | $ (13,290) | $ (5,380) | $ (5,211) | $ (59,747) | $ (44,870) | $ (10,634)
Weighted average common shares outstanding: |  |  |  |  |  |  |  |  | 361,845,000 | 337,297,000 | 313,887,000
Diluted shares outstanding: |  |  |  |  |  |  |  |  | 361,845,000 | 337,297,000 | 313,887,000
Net loss per share: |  |  |  |  |  |  |  |  |  |  |
Basic and Diluted (in dollars per share) | $ (0.07) | $ (0.03) | $ (0.04) | $ (0.02) | $ (0.06) | $ (0.04) | $ (0.02) | $ (0.02) | $ (0.17) | $ (0.13) | $ (0.03)
Warrants |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |  |  |  |  |  |  |  |
Options outstanding not included in the computation of diluted weighted average shares because their effect would have been anti-dilutive (in shares) |  |  |  |  |  |  |  |  | 29,770,766 |  | 10,350,000
Price per common share for each warrant |  |  |  |  |  |  |  |  |  |  | $ 2.70
Warrants | Minimum |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |  |  |  |  |  |  |  |
Price per common share for each warrant | 1.72 |  |  |  |  |  |  |  | $ 1.72 |  |
Warrants | Maximum |  |  |  |  |  |  |  |  |  |  |
Antidilutive Securities Excluded from Computation of Earnings Per Share |  |  |  |  |  |  |  |  |  |  |
Price per common share for each warrant | $ 2.00 |  |  |  |  |  |  |  | $ 2.00 |  |

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- Definition Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
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