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NEW ACCOUNTING STANDARDS IMPLMEMENTED (Details) - USD ($) | Dec. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
--- | --- | --- | --- | --- | ---
Liabilities [Abstract] |  |  |  |  |
Current portion of deferred revenue | $ 296,000 | $ 0 | $ 3,214,000 |  |
Total current liabilities | 20,354,000 | 2,393,000 | 5,607,000 |  |
Deferred revenue, net of current portion | 0 | 0 | 3,061,000 |  |
Total liabilities | 40,354,000 | 2,393,000 | 8,668,000 |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |
Accumulated deficit | (410,188,000) | (353,517,000) | (359,792,000) |  |
Total stockholders' equity | 134,045,000 | $ 176,373,000 | 170,098,000 | $ 99,098,000 | $ 67,721,000
Scenario Previously Reported |  |  |  |  |
Liabilities [Abstract] |  |  |  |  |
Current portion of deferred revenue | 6,308,000 |  | 3,214,000 |  |
Total current liabilities | 26,366,000 |  | 5,607,000 |  |
Deferred revenue, net of current portion | 2,460,000 |  | 3,061,000 |  |
Total liabilities | 48,826,000 |  | 8,668,000 |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |
Accumulated deficit | (412,382,000) |  | (359,792,000) |  |
Total stockholders' equity | 131,851,000 |  | 170,098,000 |  |
Scenario Adjustment |  |  |  |  |
Liabilities [Abstract] |  |  |  |  |
Current portion of deferred revenue | (6,012,000) |  | (3,214,000) |  |
Total current liabilities | (6,012,000) |  | (3,214,000) |  |
Deferred revenue, net of current portion | (2,460,000) |  | (3,061,000) |  |
Total liabilities | (8,472,000) |  | (6,275,000) |  |
Stockholders' Equity Attributable to Parent [Abstract] |  |  |  |  |
Accumulated deficit | 2,194,000 |  | 6,275,000 |  |
Total stockholders' equity | $ 2,194,000 |  | $ 6,275,000 |  |

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- Definition The carrying amount of consideration received or receivable as of the balance sheet date on potential earnings that were not recognized as revenue in conformity with GAAP, and which are expected to be recognized as such within one year or the normal operating cycle, if longer, including sales, license fees, and royalties, but excluding interest income. + References Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 8 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=82887183&loc=d3e6935-107765 + Details
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