Condensed Consolidated Statements of Income and Comprehensive Income (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Revenues:
Royalty and license	$ 11,602	$ 9,980	$ 26,759	$ 23,629
Product sales	0	13	0	32
Development, services, and other	229	208	508	400
Total revenues	11,831	10,201	27,267	24,061
Costs and expenses:
Cost of revenues (exclusive of amortization of intangibles shown separately below)	101	127	221	275
Sales and marketing	2,637	2,294	5,400	4,541
Research and development	3,006	2,663	6,064	5,236
General and administrative	5,950	4,649	12,471	11,827
Amortization of intangibles	20	20	40	40
Total costs and expenses	11,714	9,753	24,196	21,919
Operating income	117	448	3,071	2,142
Interest and other income	144	28	137	38
Income before provision for income taxes	261	476	3,208	2,180
Provision for income taxes	(92)	(10)	(1,175)	(27)
Net income	169	466	2,033	2,153
Basic net income per share	$ 0.01	$ 0.02	$ 0.07	$ 0.08
Shares used in calculating basic net income per share	28,383	28,146	28,376	27,787
Diluted net income per share	$ 0.01	$ 0.02	$ 0.07	$ 0.07
Shares used in calculating diluted net income per share	29,210	29,293	29,330	28,912
Other Comprehensive Income
Change in unrealized gains on short-term investments	1	1	2	4
Total Other Comprehensive Income	1	1	2	4
Total Comprehensive Income	$ 170	$ 467	$ 2,035	$ 2,157