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Investments (Tables)
 12 Months Ended
Sep. 30, 2017
Equity [Abstract]  
Summary of Short-term Investments

The following tables summarize the Company’s short-term investments as of September 30, 2017, and September 30, 2016.

 

 

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

 

 

 

As of September 30, 2016

 

 

Amortized Cost

 

 

Gross Unrealized Gains

 

 

Gross Unrealized Losses

 

 

Fair Value

 

Commercial notes (due within one year)

$

—

 

 

$

—

 

 

$

—

 

 

$

—