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Investments (Tables)
 3 Months Ended
Dec. 31, 2017
Equity [Abstract]  
Summary of Short-term Investments

The following tables summarize the Company’s short-term investments as of December 31, 2017, and September 30, 2017.

 

 

As of December 31, 2017

 

 

Amortized Cost

 

 

Gross Unrealized Gains

 

 

Gross Unrealized Losses

 

 

Fair Value

 

Commercial notes (due within one year)

$

39,169,376

 

 

$

—

 

 

$

(376,905)

 

 

$

38,792,471

 

 

 

As of September 30, 2017

 

 

Amortized Cost

 

 

Gross Unrealized Gains

 

 

Gross Unrealized Losses

 

 

Fair Value

 

Commercial notes (due within one year)

$

40,769,539

 

 

$

—

 

 

$

(334,755)

 

 

$

40,434,784