Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues:
Royalty and license	$ 10,951	$ 6,371	$ 34,580	$ 21,386
Product sales	12	529	44	1,145
Development contracts and other	379	242	779	778
Total revenues	11,342	7,142	35,403	23,309
Costs and expenses:
Cost of revenues (exclusive of amortization, abandonment, and impairment of intangibles shown separately below)	111	273	386	802
Sales and marketing	2,151	1,632	6,692	5,072
Research and development	2,640	2,088	7,876	6,406
General and administrative	4,533	5,750	14,647	14,882
Amortization, abandonment, and impairment of intangibles	487	337	1,364	1,071
Total costs and expenses	9,922	10,080	30,965	28,233
Operating income (loss)	1,420	(2,938)	4,438	(4,924)
Interest and other income	42	66	80	144
Income (loss) from continuing operations before provision for income taxes	1,462	(2,872)	4,518	(4,780)
Provision for income taxes	(257)	(118)	(284)	(737)
Income (loss) from continuing operations	1,205	(2,990)	4,234	(5,517)
Discontinued operations (Note 10) :
Gain on sales of discontinued operations net of provision for income taxes of $0, $0, $0, and $97	0	0	0	153
Net income (loss)	1,205	(2,990)	4,234	(5,364)
Basic net income (loss) per share
Continuing operations	$ 0.04	$ (0.11)	$ 0.15	$ (0.20)
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Total	$ 0.04	$ (0.11)	$ 0.15	$ (0.19)
Shares used in calculating basic net income (loss) per share	28,558	27,658	28,047	27,885
Diluted net income (loss) per share
Continuing operations	$ 0.04	$ (0.11)	$ 0.14	$ (0.20)
Discontinued operations	$ 0.00	$ 0.00	$ 0.00	$ 0.01
Total	$ 0.04	$ (0.11)	$ 0.14	$ (0.19)
Shares used in calculating diluted net income (loss) per share	29,653	27,658	29,205	27,885
Other Comprehensive Income (loss)
Change in unrealized gains (losses) on short-term investments	10	6	6	(11)
Total Other Comprehensive Income (loss)	10	6	6	(11)
Total Comprehensive Income (loss)	$ 1,215	$ (2,984)	$ 4,240	$ (5,375)