Note 16 - Segment Information (Detail) - Segment Information Reconciled to Total Company Consolidated Financial Results (USD $)	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Revenues, net	$ 148,489,000	$ 128,568,000
Cost of revenues	90,618,000	66,015,000
Research and development	19,605,000	18,816,000
Patent litigation	4,278,000	4,038,000
Income (loss) before provision for income taxes	153,720,000	18,634,000
Global Division [Member]
Revenues, net	101,636,000	123,265,000
Cost of revenues	61,444,000	63,106,000
Research and development	11,711,000	10,673,000
Patent litigation	4,278,000	4,038,000
Income (loss) before provision for income taxes	19,160,000	41,131,000
Impax Division [Member]
Revenues, net	46,853,000	5,303,000
Cost of revenues	29,174,000	2,909,000
Research and development	7,894,000	8,143,000
Income (loss) before provision for income taxes	(2,979,000)	(8,810,000)
Corporate and Other [Member]
Income (loss) before provision for income taxes	$ 137,539,000	$ (13,687,000)