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Summary of Significant Accounting Policies (Tables)
6 Months Ended
Jun. 30, 2019
Accounting Policies [Abstract]  
Schedule of Earnings Per Share Anti-diluted

The following financial instruments were not included in the diluted loss per share calculation as of June 30, 2019 and 2018 because their effect was anti-dilutive:

 

   As of June 30, 
   2019   2018 
Warrants to purchase common stock   1,229,710    2,068,821 
Series C-1 Convertible Preferred stock   196,093    196,093 
Total   1,425,803    2,264,914