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STOCKHOLDERS' EQUITY AND SHARE-BASED COMPENSATION (Details 4)
9 Months Ended
Sep. 30, 2019
$ / shares
shares
Share-based Payment Arrangement [Abstract]  
Warrants outstanding, beginning | shares 5,017,181
Issued | shares 2,076,922
Exercised | shares (361,317)
Warrants outstanding, ending | shares 6,732,786
Average purchase price per share outstanding, beginning | $ / shares $ 4.82
Issued | $ / shares 6.62
Exercised | $ / shares 4.52
Average purchase price per share outstanding, ending | $ / shares $ 5.39