Variable Interest Entities - Summary of Investments in Unconsolidated Variable Interest Entities and Estimated Maximum Exposure to Loss (Detail)	Jun. 30, 2016 USD ($)
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	$ 46,927,000
Maximum Exposure to Loss	68,387,000
NovaQuest Pharma Opportunities Fund lll, L.P [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	40,077,000
Maximum Exposure to Loss	48,612,000
NovaQuest Pharma Opportunities Fund lV, L.P [Member]
Variable Interest Entity [Line Items]
Investments in Unconsolidated VIEs	6,850,000
Maximum Exposure to Loss	$ 19,775,000