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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)
3 Months Ended
Mar. 31, 2019
SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES [Abstract]  
Outstanding Securities not Included in the Computation of Diluted Net Loss

The following table summarizes the outstanding securities not included in the computation of diluted net loss per share:

 

 

 

 

 

 

 

March 31, 

 

    

2019

    

2018

Stock options

 

498,262

 

234,670

Warrants

 

917,563

 

394,919

Preferred stock

 

20,888

 

4,177

Convertible notes

 

1,663,330

 

 —

Total

 

3,100,043

 

633,766