Investments - Summary of Investments by Type of Security (Detail) (USD $)	Sep. 30, 2014	Sep. 30, 2013
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 18,348,998	$ 5,729,034
Gross Unrealized Gains	1,472	2,378
Gross Unrealized Losses	(9,282)	(540)
Fair Market Value	18,341,188	5,730,872
Corporate debt securities [Member] | Short-term [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	16,273,996	5,729,034
Gross Unrealized Gains	1,472	2,378
Gross Unrealized Losses	(6,298)	(540)
Fair Market Value	16,269,170	5,730,872
Corporate debt securities [Member] | Long-term [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	2,075,002
Gross Unrealized Losses	(2,984)
Fair Market Value	$ 2,072,018