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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ANTI-DILUTIVE SHARES (Details) - shares
3 Months Ended 9 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Stock options and warrants excluded from diluted net loss per share calculation due to net loss position        
Antidilutive Securities Excluded from Computation of Earnings Per Share        
Potential dilutive securities excluded from diluted earnings (loss) per share calculation (in shares) 36,755,906 23,075,718 36,755,906 23,075,718