Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Revenues:
Royalty and license	$ 15,157	$ 13,649
Product sales	0	19
Development, services, and other	279	192
Total revenues	15,436	13,860
Costs and expenses:
Cost of revenues (exclusive of amortization of intangibles shown separately below)	120	148
Sales and marketing	2,763	2,247
Research and development	3,058	2,573
General and administrative	6,521	7,178
Amortization of intangibles	20	20
Total costs and expenses	12,482	12,166
Operating income	2,954	1,694
Interest and other income (expense)	(7)	10
Income before provision for income taxes	2,947	1,704
Provision for income taxes	(1,083)	(17)
Net income	1,864	1,687
Basic net income per share	$ 0.07	$ 0.06
Shares used in calculating basic net income per share	28,370	27,424
Diluted net income per share	$ 0.06	$ 0.06
Shares used in calculating diluted net income per share	29,382	28,294
Other Comprehensive Income (loss)
Change in unrealized gains (losses) on short-term investments	1	(3)
Total Other Comprehensive Income (loss)	1	(3)
Total Comprehensive Income	$ 1,865	$ 1,684