Other License Agreements and Acquired Product Rights - Additional information (Detail) (USD $) In Millions, unless otherwise specified	1 Months Ended	6 Months Ended		1 Months Ended					1 Months Ended				1 Months Ended			36 Months Ended	1 Months Ended
	Feb. 28, 2012	Jun. 30, 2013	Jun. 30, 2013 Tolmar Notes [Member]	Jun. 30, 2010 Non U S [Member]	Mar. 31, 2007 Non U S [Member]	Aug. 31, 2006 Non U S [Member]	Dec. 31, 2011 Non U S [Member]	Aug. 31, 2006 Non U S [Member] To be Paid Within 30 Days of Regulatory Approval of the First Product [Member]	Jul. 31, 2009 North America [Member]	Sep. 30, 2007 North America [Member]	Jun. 30, 2013 North America [Member]	Sep. 30, 2007 North America [Member] Due Within 30 Days from End of Quarter in Which Net Sales Reach 30 million [Member]	May 31, 2010 Kunwha License Agreement [Member]	Nov. 30, 2011 TTY License and Supply Agreement [Member]	Oct. 07, 2010 TTY License and Supply Agreement [Member]	Jun. 30, 2013 TTY License and Supply Agreement [Member]	Jul. 29, 2013 TTY License and Supply Agreement [Member] Subsequent Event [Member]
Other License Agreements And Acquired Product Rights [Line Items]
Upfront payment													$ 0.30		$ 0.30
Up-front payment net of tax													0.25
Milestone payments						0							1.3		1.3
Milestone payments net of tax													1.1
Expiration date of the agreement													Jul. 23, 2027
Term of the agreement																15 years
Milestone payment received														0.3			0.3
Purchase price of rights and assets						3				7
Cash paid as consideration						1				3
Promissory note to be paid						2.00	0.25	1.00		4.00		2.00
Promissory note paid				0.75	1.00				2.00
Promissory Note Due Period		30 days
Cumulative net sales for determining payment of promissory note										30
Amount outstanding under the Tolmar note											2
Notes Settlement amount	1.05
Notes Issued Outstanding Amount			$ 2