Commitments and Contingencies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Operating Leases Future Minimum Payment Due [Line Items]
Operating lease expiration period	2017
Rent expense	$ 100,000	$ 100,000	$ 100,000
Additional charges under lease for real estate taxes and common maintenance charges	40,000	$ 40,000	$ 20,000
Liabilities recorded for indemnification provisions	$ 0
Royalty Agreement [Member]
Operating Leases Future Minimum Payment Due [Line Items]
Net sales percentage on royalty agreement	20.00%
Net sales percentage on royalty agreement	5.00%
Net sales percentage on royalty agreement	2.50%
Royalty agreement description	(i) five percent (5%) of all Net Sales and third party payments commencing with the first quarter immediately following the quarter in which the Indebtedness Repayment Condition is satisfied, or (ii) two and one half percent (2.5%) of all Net Sales commencing with the quarter immediately following the quarter in which the Indebtedness Repayment Condition is satisfied, but only with respect to the Net Sales made in any country in which there was not a Valid Patent Claim (as defined in the Royalty Agreement) and where generic entry of a competitive product not by the Company or its affiliates that does not infringe a Valid Patent Claim in such country has occurred, in each case as of the last day of such Fiscal Quarter.