Consolidated Statements Of Operations (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Revenues:
Royalty and license	$ 26,916	$ 23,250	$ 14,202
Product sales	2,583	6,803	11,924
Development contracts and other	1,136	1,071	1,599
Total revenues	30,635	31,124	27,725
Costs and expenses:
Cost of revenues (exclusive of amortization, impairment, and abandonment of intangibles shown separately below)	1,255	2,901	8,289
Sales and marketing	7,085	8,033	13,324
Research and development	8,386	8,738	12,493
General and administrative	12,568	15,043	21,719
Amortization, impairment, and abandonment of intangibles	1,394	1,237	894
Restructuring costs	0	0	1,462
Total costs and expenses	30,688	35,952	58,181
Operating loss	(53)	(4,828)	(30,456)
Change in fair value of warrant liability	0	0	517
Interest and other income	204	272	773
Income (loss) from continuing operations before provision for income taxes	151	(4,556)	(29,166)
Benefit (provision) for income taxes	(1,816)	(1,501)	310
Loss from continuing operations	(1,665)	(6,057)	(28,856)
Discontinued operations (Note 11) :
Gain on sales from discontinued operations, net of provision for income taxes of $39, $65 and $0	61	129	237
Gain from discontinued operations, net of provision for income taxes of $0, $0, and $216	0	1	340
Net loss	$ (1,604)	$ (5,927)	$ (28,279)
Basic and diluted net loss per share:
Continuing operations	$ (0.06)	$ (0.22)	$ (1.03)
Discontinued operations	$ 0.00	$ 0.01	$ 0.02
Total	$ (0.06)	$ (0.21)	$ (1.01)
Shares used in calculating basic and diluted net loss per share	28,564	28,113	27,973