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Cash, Cash Equivalents and Short-Term Investments (Tables)
 9 Months Ended
Sep. 30, 2017
Cash, Cash Equivalents and Short-Term Investments [Abstract]  
Schedule of cash, cash equivalents and short-term investments
  

As of

September 30, 
2017

  

As of

December 31, 
2016

  (Decrease) 
Cash and cash equivalents $2,305,264  $5,150,344  ($2,845,080)
Short-term investments  -   5,474,013   (5,474,013)
Total $2,305,264  $10,624,357  ($8,319,093)
Schedule of held to maturity securities
  

As of

September 30, 2017

  

As of

December 31, 2016

  

(Decrease)

Increase

 
Amortized cost           -  $5,450,000  ($5,450,000)
Accrued interest  -   24,013   (24,013)
Gross unrealized gains  -   2,073   (2,073)
Gross unrealized losses  -   (59)  59 
Estimated fair value  -  $5,476,027  ($5,476,027)