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Intangible Assets - Schedule of Intangible Asset (Detail) (USD $)
 6 Months Ended 12 Months Ended
Mar. 31, 2013
Sep. 30, 2012
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization, beginning balance $ 3,117,322 $ 0
Intangible assets not subject to amortization, Amortization 0 0
Intangible assets not subject to amortization, ending balance 3,117,322 3,117,322
Intangible assets subject to amortization, beginning balance 1,667,247 1,731,211
Amortization (148,230) (293,964)
Intangible assets subject to amortization, ending balance 1,519,017 1,667,247
Total Intangible assets, beginning balance   1,731,211
Total Intangible assets, Amortization (148,230) (293,964)
Total Intangible assets, ending balance 4,636,339 4,784,569
Madison acquisition [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization, Additions   944,935
Intangible assets subject to amortization, Additions   230,000
Total Intangible assets, Additions   1,174,935
Alvos acquisition [Member]
    
Finite Lived And Indefinite Lived Intangible Assets [Line Items]    
Intangible assets not subject to amortization, Additions   2,172,387
Intangible assets subject to amortization, Additions   0
Total Intangible assets, Additions   $ 2,172,387