Commitments and Contingencies - Additional Information (Detail) - USD ($)	1 Months Ended	9 Months Ended
	Apr. 30, 2016	Sep. 30, 2016	Dec. 31, 2015
Product Liability Contingency [Line Items]
Accounts payable and accrued liabilities			$ 100,000
Drug Product Testing Agreement Consideration To Be Paid In Stages		$ 100,000
Prepaid Expense, Current		196,000	$ 560,000
Drug Supplier Commitments Development		200,000
Development Project ,Service Evaluation Exchange Cost		50,000
Lab Space [Member]
Product Liability Contingency [Line Items]
Operating Leases, Future Minimum Payments Due		100,000
Operating Lease Monthly Rental Payments	$ 2,500
Office Space [Member]
Product Liability Contingency [Line Items]
Operating Leases, Future Minimum Payments Due		200,000
Second Drug [Member]
Product Liability Contingency [Line Items]
Prepaid Expense, Current		100,000
Final Drug [Member]
Product Liability Contingency [Line Items]
Drug Product Testing Agreement Consideration To Be Paid In Stages		100,000
Drug Supplier Commitments Development		$ 900,000