Out-License of MARQIBO, ZEVALIN, & EVOMELA 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		1 Months Ended			12 Months Ended
	Sep. 17, 2014	Oct. 31, 2016	Jul. 31, 2016	Feb. 29, 2016	Dec. 31, 2016
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	1.8	1.1	1.7	10.0
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					$ 11,500