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STOCKHOLDERS' EQUITY (Details Narrative 3) - USD ($)
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Dec. 31, 2017
Share-based compensation expense $ 1,659,883 $ 1,301,060  
Total unrecognized estimated compensation expense $ 15,066,000    
Recognized weighted-average period 2 years 6 months    
Stock Options [Member]      
Options outstanding, ending 25,196,684   23,365,225
Weighted average grant date fair value per share of options granted $ 3.11 $ 3.96  
Stock Options [Member] | Minimum [Member]      
Option exercise prices (in dollars per shares) 0.10    
Stock Options [Member] | Maximum [Member]      
Option exercise prices (in dollars per shares) $ 8.92    
2012 Stock Incentive Plan [Member]      
Number of shares authorized for issuance 10,000,000    
Options outstanding, ending 6,445,141    
Number of shares available for issuance 3,473,333    
2009 Long Term Incentive Compensation Plan [Member]      
Number of shares authorized for issuance 25,000,000    
Options outstanding, ending 18,751,543    
Number of shares available for issuance 1,842,787    
Warrants [Member]      
Recognized weighted-average period 10 months 25 days    
Warrants [Member] | Individuals [Member]      
Shares issued for exercise of warrants, net   $ 2,460,000  
Shares issued for exercise of warrants, net (in shares)   1,810,000