Out-License of MARQIBO, ZEVALIN, & EVOMELA in China Territory - Additional Information (Detail) shares in Millions, $ in Millions		1 Months Ended			12 Months Ended
	Sep. 17, 2014 USD ($) product agreement shares	Oct. 31, 2016 shares	Jul. 31, 2016 shares	Feb. 29, 2016 shares	Dec. 31, 2016 product shares
Other Commitments [Line Items]
Number of products					6
CASI Out-License [Member]
Other Commitments [Line Items]
Number of agreements | agreement	3
Number of products	2
Shares received (shares) | shares	5.4	1.8	1.1	1.7	10.0
Undiscounted proceeds | $	$ 9.7