Business Combinations and Contingent Consideration - Summary of Allocation of Total Purchase Price to Net Assets Acquired (Detail) - Captisol-enabled, propylene glycol-free melphalan rights [Member] $ in Thousands	Mar. 31, 2013 USD ($)
Business Acquisition [Line Items]
Total purchase consideration	$ 7,700
IPR&D [Member]
Business Acquisition [Line Items]
Total purchase consideration	$ 7,700