Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Dec. 31, 2013
Expected Amortization Expense [Line Items]
Amortization period of intangible assets	12 years
Amortization of license agreements in 2014	$ 55,000
Amortization of license agreements in 2015	55,000
Amortization of license agreements in 2016	13,000
Amortization of license agreements, thereafter	$ 0
Licensing Agreements
Expected Amortization Expense [Line Items]
Amortization period of intangible assets	4 years
Minimum | Patents
Expected Amortization Expense [Line Items]
Amortization period of intangible assets	3 years
Maximum | Patents
Expected Amortization Expense [Line Items]
Amortization period of intangible assets	20 years