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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]          
Impairment of goodwill $ 1,275 $ 1,015 $ 1,569 $ 1,015  
Depreciation expense 100 100 100 100  
Amortization expense for intangible assets 300 $ 300 900 $ 300  
Amortization expense, remainder of 2018 1,200   1,200    
Amortization expense, 2019 1,000   1,000    
Amortization expense, 2020 1,000   1,000    
Amortization expense, 2021 900   900    
Amortization expense, 2022 900   900    
Deferred revenue $ 94   $ 94   $ 66
Securities not included in the computation of diluted net loss per share     19,411,045 5,919,819