CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenue:
Product revenue	$ 102,928	$ 76,354	$ 205,917	$ 149,780
Funded research and development	27	5	33	11
Total Revenue	102,955	76,359	205,950	149,791
Costs and expenses:
Cost of product revenue	17,309	12,144	32,379	23,012
Research and development	18,052	11,569	33,712	21,779
Selling, general and administrative	53,086	39,829	104,118	77,152
Costs and Expenses, Total	88,447	63,542	170,209	121,943
Income from operations	14,508	12,817	35,741	27,848
Other income (expense):
Investment income, net	342	62	611	125
Other (expense) income, net	(114)	87	(191)	140
Nonoperating Income (Expense), Total	228	149	420	265
Income before income taxes	14,736	12,966	36,161	28,113
Income tax provision	5,861	5,231	14,376	11,519
Net income	$ 8,875	$ 7,735	$ 21,785	$ 16,594
Basic net income per share	$ 0.21	$ 0.18	$ 0.51	$ 0.40
Basic weighted average shares outstanding	43,129	42,228	42,971	41,963
Diluted net income per share	$ 0.20	$ 0.17	$ 0.49	$ 0.37
Diluted weighted average shares outstanding	44,580	44,922	44,493	44,778