Investments (Tables)

6 Months Ended

Mar. 31, 2014

Summary of Short and Long-term Investments

The following tables summarize the Company’s short and long-term investments as of March 31, 2014, and September 30, 2013.

	As of March 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial notes (due within one year)	$	17,798,475	$	—	$	(115,181	)	$	17,683,294
Commercial notes (due after one year through two years)	$	34,048,359		—	$	(168,195	)	$	33,880,164
Total	$	51,846,834	$	—	$	(283,376	)	$	51,563,458

	As of September 30, 2013
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses			Fair Value
Commercial notes (due within one year)	$	9,030,261	$	7,500	$	(39,281	)	$	8,998,480
Commercial notes (due after one year through two years)	$	1,702,153		—	$	(2,362	)	$	1,699,791
Total	$	10,732,414	$	7,500	$	(41,643	)	$	10,698,271