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Stockholders' Equity (Tables)
6 Months Ended
Jun. 30, 2019
Equity [Abstract]  
Summary of Outstanding Warrants

The following table summarizes information of outstanding warrants as of June 30, 2019:

 

   Warrants   Warrant Term  Exercise Price   Exercisable 
Investors – Class G Warrants   142,857   April 2020  $4.2    142,857 
Investors - Class H Warrants   50,000   January 2020 - March 2020  $2.1    50,000 
Investors - Class I Warrants   38,095   January 2020  $2.1    38,095