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NATURE OF OPERATIONS, BASIS OF PRESENTATION AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Narrative) (Details) - USD ($)
Jun. 30, 2019
Dec. 31, 2018
Number of warrants outstanding 20,825,984  
Cash, uninsured balance  
Number of employee stock options 2,162,000 2,242,000
Series B Convertible Preferred Stock [Member]    
Number of shares issued upon conversion 5,660,000