Out-License of Marqibo, Zevalin, & Evolmela in China Territory - Schedule of Proceeds Received and Fair Value on CASI Out-License Execution Date (Detail) - USD ($) $ / shares in Units, $ in Thousands, shares in Millions	Sep. 17, 2014	Dec. 31, 2015
Secured Promissory Note Due March 17, 2016 [Member]
Other Commitments [Line Items]
Debt instrument face value	$ 1,500
CASI Out-License [Member]
Other Commitments [Line Items]
Total consideration received	$ 9,959
Shares received (shares)	5.4
Stock price on the NASDAQ Capital Market ($ per share)	$ 1.6
CASI Out-License [Member] | Secured Promissory Note Due March 17, 2016 [Member]
Other Commitments [Line Items]
Total consideration received	$ 1,310
Debt instrument coupon rate	0.50%
CASI Out-License [Member] | Common Stock [Member]
Other Commitments [Line Items]
Total consideration received	$ 8,649
Other Assets [Member] | CASI Out-License [Member] | Common Stock [Member]
Other Commitments [Line Items]
Value of securities		$ 5,200