Out-License of Marqibo, Zevalin, & Evolema in China Territory - Additional Information (Detail) (CASI Out-License [Member], USD $) In Millions, unless otherwise specified	0 Months Ended	3 Months Ended
	Sep. 17, 2014	Mar. 31, 2015
CASI Out-License [Member]
Other Commitments [Line Items]
License agreement description		Additionally, under certain conditions which generally expire on September 17, 2019, we have a right to receive additional CASI common stock in order to maintain our post-investment ownership percentage if CASI issues securities.
Net proceeds through capital raising activities	$ 10.1
License agreement expiration date		Sep. 17, 2019