Balance Sheet Account Detail - Additional Information (Detail) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Property, Plant and Equipment [Line Items]
Depreciation expense	$ 500	$ 700	$ 1,100
Intangible assets, net	164,234	190,335
Intangible asset amortization expense	25,900	38,300	$ 24,300
MARQIBO IPR&D (NHL and further ALL indications) [Member]
Property, Plant and Equipment [Line Items]
Intangible assets, net	$ 17,600	$ 17,600