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, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Revenues:
Royalty and license	$ 9,980	$ 5,930	$ 23,629	$ 15,015
Product sales	13	344	32	616
Development contracts and other	208	202	400	536
Total revenues	10,201	6,476	24,061	16,167
Costs and expenses:
Cost of revenues (exclusive of amortization, abandonment, and impairment of intangibles shown separately below)	127	214	275	529
Sales and marketing	2,294	1,694	4,541	3,440
Research and development	2,663	2,124	5,236	4,318
General and administrative	3,976	4,361	10,114	9,132
Amortization, abandonment, and impairment of intangibles	383	393	877	734
Total costs and expenses	9,443	8,786	21,043	18,153
Operating income (loss)	758	(2,310)	3,018	(1,986)
Interest and other income	28	68	38	78
Income (loss) from continuing operations before provision for income taxes	786	(2,242)	3,056	(1,908)
Provision for income taxes	(10)	(66)	(27)	(619)
Income (loss) from continuing operations	776	(2,308)	3,029	(2,527)
Discontinued operations (Note 10) :
Gain on sales of discontinued operations net of provision for income taxes of $0, $97, $0, and $97	0	153	0	153
Net income (loss)	776	(2,155)	3,029	(2,374)
Basic net income (loss) per share
Continuing operations	$ 0.03	$ (0.08)	$ 0.11	$ (0.09)
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Total	$ 0.03	$ (0.08)	$ 0.11	$ (0.09)
Shares used in calculating basic net income (loss) per share	28,146	28,058	27,787	28,000
Diluted net income (loss) per share
Continuing operations	$ 0.03	$ (0.08)	$ 0.10	$ (0.09)
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.00
Total	$ 0.03	$ (0.08)	$ 0.10	$ (0.09)
Shares used in calculating diluted net income (loss) per share	29,293	28,058	28,912	28,000
Other Comprehensive Income (loss)
Change in unrealized gains (losses) on short-term investments	1	2	4	(17)
Total Other Comprehensive Income (loss)	1	2	4	(17)
Total Comprehensive Income (loss)	$ 777	$ (2,153)	$ 3,033	$ (2,391)