CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	9 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Mar. 31, 2011	Mar. 31, 2010
Revenue:
Product revenue	$ 13,215,053	$ 11,810,869	$ 14,961,397	$ 10,304,727
Royalty and other revenue	10,235,194	9,573,770	12,329,627	10,666,342
Total revenue	23,450,247	21,384,639	27,291,024	20,971,069
Operating expenses: (1)
Cost of product revenue	5,157,135	4,186,670	5,579,759	4,159,002
Cost of royalty and other revenue	1,315,315	1,160,775	1,537,666	1,347,168
Research and development	9,461,960	8,744,548	12,528,819	14,159,721
Selling, general and administrative	9,050,382	5,580,215	8,018,851	7,071,859
Gain on bargain purchase	(427,478)
Total operating expenses	24,557,314	19,672,208	27,665,095	26,737,750
(Loss) income from operations	(1,107,067)	1,712,431	(374,071)	(5,766,681)
Investment income	161,053	287,430	356,729	870,043
Interest expense	(27,773)	(12,683)	(26,167)	(1,972)
Other expense	(623,094)
(Loss) income before income taxes	(1,596,881)	1,987,178	(43,509)	(4,898,610)
Income tax provision (benefit)	15,744			(834,766)
Net (loss) income	$ (1,612,625)	$ 1,987,178	$ (43,509)	$ (4,063,844)
Earnings (loss) per share:
Basic	$ (0.05)	$ 0.06	$ 0.00	$ (0.13)
Diluted	$ (0.05)	$ 0.06	$ 0.00	$ (0.13)
Weighted average shares outstanding:
Basic	30,774,467	30,778,430	30,781,881	30,752,041
Diluted	30,774,467	30,949,264	30,781,881	30,752,041