v3.19.1

INCOME TAXES (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |
Federal statutory income tax rate, percentage |  | 21.00% | 35.00% |
Change in enacted tax rate |  | $ 634 | $ 115,545 |
Change in valuation allowance |  | (3,330) | (104,710) | $ 24,522
Benefit to tax rate | $ 1,400 | 2,700 |  |
Deferred tax assets, gross | 221,707 | 218,377 | 221,707 |
Deferred tax assets, operating loss carry forwards, federal |  | 240,000 |  |
Deferred tax assets, 0perating loss carry forwards, state |  | 296,500 |  |
Deferred tax assets, federal research and development credits | 1,870 | 1,870 | 1,870 |
Deferred tax assets, net | $ 0 | $ 0 | $ 0 |

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