Investments (Tables)

12 Months Ended

Sep. 30, 2015

Equity [Abstract]

Summary of Short and Long-term Investments

The following tables summarize the Company’s short- and long-term investments as of September 30, 2015, and September 30, 2014:

	As of September 30, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial notes (due within one year)	$	17,539,902	$	—	$	(304,942	)	$	17,234,960
Commercial notes (due after one year through two years)	$	—		—	$	—		$	—
Total	$	17,539,902	$	—	$	(304,942	)	$	17,234,960

	As of September 30, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial notes (due within one year)	$	21,653,032	$	—	$	(189,830	)	$	21,463,202
Commercial notes (due after one year through two years)	$	23,088,346		—	$	(217,693	)	$	22,870,653
Total	$	44,741,378	$	—	$	(407,523	)	$	44,333,855