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INCOME TAXES (Schedule of Deferred Tax Assets and Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Income Tax Disclosure [Abstract] |  |
Operating loss carry forward | $ 54,093 | $ 48,663
Research and development | 9,298 | 7,921
Accrued social benefits and other | 874 | 530
Property and equipment | (46) | (135)
Deferred tax asset before valuation allowance | 64,219 | 56,979
Valuation allowance | (64,219) | (56,979)
Net deferred tax asset |  |

X
- Definition Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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