CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Revenue:
Product revenue	$ 38,647	$ 27,166
Funded research and development	136	189
Total Revenue	38,783	27,355
Costs and expenses:
Cost of product revenue	7,446	5,891
Research and development	6,712	7,324
Selling, general and administrative	20,953	18,176
Amortization of intangible assets	111	385
Costs and Expenses, Total	35,222	31,776
Income (loss) from operations	3,561	(4,421)
Other (expense) income:
Investment (expense) income, net	(2)	4
Other expense, net	(4)	(81)
Nonoperating Income (Expense), Total	(6)	(77)
Income (loss) before income tax provision	3,555	(4,498)
Income tax provision	436	96
Net income (loss)	$ 3,119	$ (4,594)
Basic net income (loss) per share	$ 0.08	$ (0.12)
Basic weighted average shares outstanding	39,144	38,268
Diluted net income (loss) per share	$ 0.08	$ (0.12)
Diluted weighted average shares outstanding	41,549	38,268