Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues:
Royalty and license	$ 5,930	$ 5,882	$ 15,015	$ 14,235
Product sales	344	546	616	1,547
Development contracts and other	202	254	536	668
Total revenues	6,476	6,682	16,167	16,450
Costs and expenses:
Cost of revenues (exclusive of amortization, impairment, and abandonment of intangibles shown separately below)	214	247	529	721
Sales and marketing	1,694	1,909	3,440	3,759
Research and development	2,124	2,243	4,318	4,342
General and administrative	4,361	3,061	9,132	6,172
Amortization, impairment and abandonment of intangibles	393	335	734	692
Total costs and expenses	8,786	7,795	18,153	15,686
Operating income (loss)	(2,310)	(1,113)	(1,986)	764
Interest and other income	68	52	78	114
Income (loss) from continuing operations before provision for income taxes	(2,242)	(1,061)	(1,908)	878
Provision for income taxes	(66)	(267)	(619)	(861)
Income (loss) from continuing operations	(2,308)	(1,328)	(2,527)	17
Discontinued operations (Note 10) :
Gain on sales of discontinued operations net of provision for income taxes of $97, $12, $97 and $39	153	18	153	61
Net income (loss)	(2,155)	(1,310)	(2,374)	78
Basic net income (loss) per share
Continuing operations	$ (0.08)	$ (0.05)	$ (0.09)	$ 0.00
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Total	$ (0.08)	$ (0.05)	$ (0.09)	$ 0.00
Shares used in calculating basic net income (loss) per share	28,058	28,610	28,000	28,431
Diluted net income (loss) per share
Continuing operations	$ (0.08)	$ (0.05)	$ (0.09)	$ 0.00
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Total	$ (0.08)	$ (0.05)	$ (0.09)	$ 0.00
Shares used in computation of diluted net income (loss) per share	28,058	28,610	28,000	29,241
Other Comprehensive Income (loss)
Change in unrealized gains (losses) on short-term investments	2	18	(17)	22
Total Other Comprehensive Income (loss)	2	18	(17)	22
Total Comprehensive Income (loss)	$ (2,153)	$ (1,292)	$ (2,391)	$ 100