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Cash and Cash Equivalents and Short-Term Investments (Tables)
6 Months Ended
Jun. 30, 2019
Cash and Cash Equivalents [Abstract]  
Schedule of cash, cash equivalents and short-term investments

   As of
June 30, 2019
   As of
December 31, 2018
 
Cash and cash equivalents  $1,296,016   $2,521,050 
Short-term investments   8,675,329     
Total  $9,971,345   $2,521,050