Condensed Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Revenues:
Royalty and license	$ 11,714	$ 10,951	$ 38,473	$ 34,580
Product sales	0	12	0	44
Development, services, and other	337	379	845	779
Total revenues	12,051	11,342	39,318	35,403
Costs and expenses:
Cost of revenues (exclusive of amortization of intangibles shown separately below)	104	111	325	386
Sales and marketing	2,238	2,151	7,638	6,692
Research and development	2,718	2,640	8,782	7,876
General and administrative	5,274	5,606	17,745	17,433
Amortization of intangibles	15	20	55	60
Total costs and expenses	10,349	10,528	34,545	32,447
Operating income	1,702	814	4,773	2,956
Interest and other income (expense)	(30)	42	107	80
Income before provision for income taxes	1,672	856	4,880	3,036
Provision for income taxes	(599)	(257)	(1,774)	(284)
Net income	1,073	599	3,106	2,752
Basic net income per share	$ 0.04	$ 0.02	$ 0.11	$ 0.10
Shares used in calculating basic net income per share	28,505	28,558	28,420	28,047
Diluted net income per share	$ 0.04	$ 0.02	$ 0.11	$ 0.09
Shares used in calculating diluted net income per share	29,351	29,653	29,355	29,205
Other Comprehensive Income
Change in unrealized gains on short-term investments	3	10	5	6
Total Other Comprehensive Income	3	10	5	6
Total Comprehensive Income	$ 1,076	$ 609	$ 3,111	$ 2,758