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Significant Accounting Policies (Tables)
 9 Months Ended
Sep. 30, 2017
Accounting Policies [Abstract]  
Amortized Cost Basis, Aggregate Fair Value, Net Unrealized (Gains)/Losses and Net Carrying Value of Investments in Held-to-maturity Securities

The following table provides the amortized cost basis, aggregate fair value, net unrealized (gains)/losses and the net carrying value of investments in held-to-maturity securities as of September 30, 2017:

 

September 30, 2017

 

 

Amortized

 

 

Aggregate

 

 

Unrealized

 

 

Unrealized

 

 

Net Carrying

 

 

Cost

 

 

Fair Value

 

 

Gains

 

 

Losses

 

 

Value

 

Marketable securities:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Corporate bonds - current

$

96,675,088

 

 

$

96,654,738

 

 

$

(726

)

 

$

21,075

 

 

$

96,675,088

 

Corporate bonds - noncurrent

 

10,355,092

 

 

 

10,337,216

 

 

 

-

 

 

 

17,876

 

 

 

10,355,092

 

Marketable securities:

$

107,030,180

 

 

$

106,991,954

 

 

$

(726

)

 

$

38,951

 

 

$

107,030,180