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Stockholders' Equity (Tables)
3 Months Ended
Mar. 31, 2019
Equity [Abstract]  
Summary of Outstanding Warrants

The following table summarizes information of outstanding warrants issued to investors and consultants in exchange for their services as of March 31, 2019:

 

    Warrants     Warrant Term   Exercise Price     Exercisable  
Investors – Class F (*) Warrants     2,142,857     April 2019   $ 0.14       2,142,857  
Investors – Class G (*) Warrants     2,142,857     April 2019   $ 0.28       2,142,857  
Investors - Class H Warrants     750,000     January 2020 -March 2020   $ 0.14       750,000  
Investors - Class I Warrants     571,429     January 2020   $ 0.14       571,429  

 

(*) Subsequent to the balance sheet date, these warrants expired.