Subsequent Event - Additional Information (Detail) - Dong A S T Company Limited - Subsequent Event [Member]	Apr. 11, 2016 USD ($) License
Subsequent Event [Line Items]
License Agreement Effective Date	Apr. 11, 2016
Number of License Agreement | License	2
Evogliptin License Agreement [Member]
Subsequent Event [Line Items]
Upfront cash payment	$ 1,500,000
Evogliptin License Agreement [Member] | Maximum [Member]
Subsequent Event [Line Items]
Payment upon achievement of development and regulatory milestones	25,000,000
Additional milestone payment for each additional therapeutic indication	10,000,000
Additional payment receivable upon achievement of commercial milestones	35,000,000
CVC License Agreement [Member]
Subsequent Event [Line Items]
Upfront cash payment receivable	500,000
Additional milestone payment for each additional therapeutic indication	500,000
CVC License Agreement [Member] | Maximum [Member]
Subsequent Event [Line Items]
Additional payment receivable upon achievement of milestones	$ 2,500,000