Investments (Tables)

9 Months Ended

Jun. 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 June 30, 2015, and September 30, 2014.

	As of June 30, 2015
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial notes (due within one year)	$	23,280,640	$	—	$	(207,165	)	$	23,073,475
Commercial notes (due after one year through two years)	$	1,085,282		—	$	(30,412	)	$	1,054,870
Total	$	24,365,922	$	—	$	(237,577	)	$	24,128,345

	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