Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Dec. 31, 2015
Product Liability Contingency [Line Items]
Accounts payable and accrued liabilities	$ 100
Drug Product Testing Agreement Consideration To Be Paid In Stages	500	$ 600
Operating Leases, Future Minimum Payments Due	300
Other Inventory, Gross	611		$ 560
Drug Supplier Commitments Development	100
First Drug [Member]
Product Liability Contingency [Line Items]
Other Inventory, Gross	600
Second Drug [Member]
Product Liability Contingency [Line Items]
Other Inventory, Gross	$ 100