Quarterly report pursuant to Section 13 or 15(d)

SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)

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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
 6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]  
Noncash stock-based compensation expense
    Three Months Ended June 30,     Six Months Ended June 30,  
    2019     2018     2019     2018  
Stock options   $ 1,339,000     $ 597,000     $ 2,631,000     $ 1,229,000  
Warrants     367,000       227,000       1,654,000       453,000  
Restricted stock units     85,000       3,000       236,000       6,000  
Earn-Out compensation expense (Note 5)     8,000       -       8,000       -  
Total noncash stock compensation expense   $ 1,799,000     $ 827,000     $ 4,529,000     $ 1,688,000