Intangible Assets - Schedule of Intangible Asset (Detail) (USD $)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets not subject to amortization, beginning balance	$ 0	$ 0
Intangible assets not subject to amortization, Amortization	0	0
Intangible assets not subject to amortization, ending balance	3,117,322	0
Intangible assets subject to amortization, beginning balance	1,731,211	1,973,019
Amortization	(293,964)	(241,808)
Intangible assets subject to amortization, ending balance	1,667,247	1,731,211
Balance at September 30, 2010		1,973,019
Amortization	(293,964)	(241,808)
Balance at September 30, 2011	4,784,569	1,731,211
Madison acquisition [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Additions	230,000
Intangible assets not subject to amortization, Additions	944,935
Additions	1,174,935
Alvos acquisition [Member]
Finite Lived And Indefinite Lived Intangible Assets [Line Items]
Intangible assets subject to amortization, Additions	0
Intangible assets not subject to amortization, Additions	2,172,387
Additions	$ 2,172,387