CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Revenue:
Product revenue	$ 61,966	$ 46,141	$ 162,400	$ 133,038
Funded research and development	39	54	354	172
Total Revenue	62,005	46,195	162,754	133,210
Costs and expenses:
Cost of product revenue	9,838	9,458	29,139	27,208
Research and development	8,365	7,779	26,120	22,787
Selling, general and administrative	30,139	24,364	91,192	78,530
Costs and Expenses, Total	48,342	41,601	146,451	128,525
Income from operations	13,663	4,594	16,303	4,685
Other income:
Investment income, net	48	37	128	78
Other (loss) income, net	(10)	20	(38)	5
Nonoperating Income (Expense), Total	38	57	90	83
Income before income tax provision	13,701	4,651	16,393	4,768
Income tax provision	1,017	258	1,579	1,039
Net income	$ 12,684	$ 4,393	$ 14,814	$ 3,729
Basic net income per share	$ 0.31	$ 0.11	$ 0.37	$ 0.10
Basic weighted average shares outstanding	40,856	39,592	40,456	39,179
Diluted net income per share	$ 0.30	$ 0.11	$ 0.35	$ 0.09
Diluted weighted average shares outstanding	42,884	41,726	42,345	41,315