Commitments and Contingencies - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 31, 2013	Dec. 31, 2012
Product Liability Contingency [Line Items]
Estimates reimbursable past patent expenses	$ 75,000
Patent expense per quarter	25,000
Accrued expense - related party	15,000
Other inventory, gross	96,000	195,000
Drug Product Testing Agreement Consideration To Be Paid In Stages	340,000
Patented Technology
Product Liability Contingency [Line Items]
Accounts payable and accrued liabilities	$ 50,000