Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) (USD $) In Thousands, except Share data	3 Months Ended
	Jun. 30, 2011	Jun. 30, 2010
REVENUES:
Manufacturing revenues	$ 38,759	$ 26,891
Royalty revenues	10,181	8,917
Product sales, net	9,686	6,204
Research and development revenue under collaborative arrangements	3,257	268
Total revenues	61,883	42,280
EXPENSES:
Cost of goods manufactured and sold	16,219	12,665
Research and development	28,050	22,977
Selling, general and administrative	31,497	19,726
Total expenses	75,766	55,368
OPERATING LOSS	(13,883)	(13,088)
OTHER INCOME (EXPENSE), NET:
Interest income	502	852
Interest expense		(1,130)
Other income (expense), net	89	(101)
Total other income (expense), net	591	(379)
LOSS BEFORE INCOME TAXES	(13,292)	(13,467)
INCOME TAX BENEFIT	(54)	(58)
NET LOSS	(13,238)	(13,409)
LOSS PER COMMON SHARE:
Basic and diluted	$ (0.14)	$ (0.14)
WEIGHTED AVERAGE NUMBER OF COMMON SHARES OUTSTANDING:
Basic and diluted	96,649	95,326
COMPREHENSIVE LOSS:
Net loss	(13,238)	(13,409)
Unrealized gains on marketable securities:
Holding gains, net of tax	529	494
Unrealized gains on marketable securities	529	494
COMPREHENSIVE LOSS	$ (12,709)	$ (12,915)