CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues:
Royalty revenue	$ 16,995	$ 16,638	$ 52,030	$ 45,148
Development and license revenue	199	308	7,068	562
Total revenues	17,194	16,946	59,098	45,710
Operating expenses:
Research and development	13,633	13,546	43,092	29,531
General and administrative	4,188	5,095	12,180	12,246
Amortization of intangibles	1,938	1,485	6,036	1,485
Impairment of intangibles	7,402		7,402
Gains on disposition of assets and sale of products	(576)		(1,276)	(700)
Total operating expenses	26,585	20,126	67,434	42,562
Income (loss) from operations	(9,391)	(3,180)	(8,336)	3,148
Interest income	50	48	136	153
Gain on sale of investments and fixed assets	2,591		2,583	10
Other than temporary decline in value of investments	(485)		(524)
Other expense	(4)	(291)	(31)	(291)
Income (loss) before income taxes	(7,239)	(3,423)	(6,172)	3,020
Income tax benefit	5,479	2,352	9,892	2,302
Net income (loss)	$ (1,760)	$ (1,071)	$ 3,720	$ 5,322
Net income (loss) per common share:
Basic (in dollars per share)	$ (0.02)	$ (0.01)	$ 0.04	$ 0.08
Diluted (in dollars per share)	$ (0.02)	$ (0.01)	$ 0.04	$ 0.08
Weighted average shares outstanding:
Basic (in shares)	93,316	86,116	93,175	69,054
Diluted (in shares)	93,316	86,116	102,335	69,809