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Investment in Inex Bio, Inc - Summary of Purchase Price Paid to Inex Bio (Detail) - Other Owner Of Inex Bio Inc $ in Thousands	9 Months Ended
	Sep. 30, 2015 USD ($)
Business Acquisition [Line Items]
Cash paid by InexBio Holdings, LLC	$ 1,100
Payments to acquire business	1,482
Fair value of warrants	5,170
Aggregate purchase price	$ 7,752

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Amount of consideration transferred, consisting of acquisition-date fair value of assets transferred by the acquirer, liabilities incurred by the acquirer, and equity interest issued by the acquirer.

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