Condensed Consolidated Statements of Operations (Unaudited) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Royalties	$ 5,724	$ 3,213	$ 16,466	$ 9,256
Material sales	6,728	1,818	12,260	4,150
Collaborative research and development and other revenues	553	1,344	5,511	4,347
Total revenues	13,005	6,375	34,237	17,753
Operating costs and expenses:
Cost of sales	2,538	683	4,416	1,273
Research and development	2,414	2,647	6,900	8,315
General and administrative	4,756	4,306	13,564	11,579
Lease exit and termination costs	227	164	359	666
Write-off of in-process research and development	0	0	480	0
Total operating costs and expenses	9,935	7,800	25,719	21,833
Income (loss) from operations	3,070	(1,425)	8,518	(4,080)
Other (expense) income:
Interest expense, net	(394)	(735)	(1,755)	(2,198)
(Increase) decrease in contingent liabilities	(532)	2,093	368	1,191
Other, net	(119)	15	69	272
Total other (expense) income, net	(1,045)	1,373	(1,318)	(735)
Income (loss) before income taxes	2,025	(52)	7,200	(4,815)
Income tax expense	(60)	(142)	(237)	(445)
Income (loss) from continuing operations	1,965	(194)	6,963	(5,260)
Discontinued operations:
Gain on sale of Avinza Product Line before income taxes			2,588	3,656
Income tax benefit on discontinued operations				14
Income from discontinued operations			2,588	3,670
Net income (loss):	$ 1,965	$ (194)	$ 9,551	$ (1,590)
Basic per share amounts:
Income (loss) from continuing operations (in usd per share)	$ 0.10	$ (0.01)	$ 0.34	$ (0.27)
Income from discontinued operations (in usd per share)			$ 0.13	$ 0.19
Net income (loss) (in usd per share)	$ 0.10	$ (0.01)	$ 0.47	$ (0.08)
Diluted per share amounts:
Income (loss) from continuing operations (in usd per share)	$ 0.09	$ (0.01)	$ 0.33	$ (0.27)
Income from discontinued operations (in usd per share)			$ 0.13	$ 0.19
Net income (loss) (in usd per share)	$ 0.09	$ (0.01)	$ 0.46	$ (0.08)
Weighted average number of common shares-basic (in shares)	20,357,558	19,917,676	20,268,261	19,791,793
Weighted average number of common shares-diluted (in shares)	20,843,742	19,917,676	20,562,622	19,791,793