CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenue:
Product revenue	$ 76,354	$ 51,774	$ 149,780	$ 100,434
Funded research and development	5	164	11	315
Total Revenue	76,359	51,938	149,791	100,749
Costs and expenses:
Cost of product revenue	12,144	9,612	23,012	19,301
Research and development	11,569	8,693	21,779	17,755
Selling, general and administrative	39,829	29,455	77,152	61,053
Costs and Expenses, Total	63,542	47,760	121,943	98,109
Income from operations	12,817	4,178	27,848	2,640
Other income (loss):
Investment income, net	62	36	125	80
Other income (loss), net	87	(39)	140	(28)
Nonoperating Income (Expense), Total	149	(3)	265	52
Income before income taxes	12,966	4,175	28,113	2,692
Income tax provision	5,231	336	11,519	562
Net income	$ 7,735	$ 3,839	$ 16,594	$ 2,130
Basic net income per share	$ 0.18	$ 0.09	$ 0.40	$ 0.05
Basic weighted average shares outstanding	42,228	40,448	41,963	40,256
Diluted net income per share	$ 0.17	$ 0.09	$ 0.37	$ 0.05
Diluted weighted average shares outstanding	44,922	42,239	44,778	42,069