Legal Proceedings - Additional Information (Detail) (USD $)		3 Months Ended	9 Months Ended	3 Months Ended
	Mar. 31, 2011	Mar. 31, 2011 Research and Development Expense [Member]	Sep. 30, 2011 Research and Development Expense [Member]	Sep. 30, 2012 Selling General and Administrative Expenses [Member]
Commitments and Contingencies Disclosure [Line Items]
Settlement agreement amount	$ 32,000
Settlement of trade debt		$ 15,000	$ 15,000	$ 490,000