Condensed Consolidated Statements of Operations and Comprehensive Income (Loss) (USD $) In Thousands, except Per Share data, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Revenues:
Royalty and license	$ 16,012	$ 15,157
Development, services, and other	275	279
Total revenues	16,287	15,436
Costs and expenses:
Cost of revenues (exclusive of amortization of intangibles shown separately below)	115	120
Sales and marketing	4,210	2,763
Research and development	3,727	3,058
General and administrative	8,293	6,521
Amortization of intangibles	12	20
Total costs and expenses	16,357	12,482
Operating income (loss)	(70)	2,954
Interest and other income (expense)	(25)	(7)
Income (loss) before benefit (provision) for income taxes	(95)	2,947
Benefit (provision) for income taxes	36	(1,083)
Net income (loss)	(59)	1,864
Basic net income (loss) per share	$ 0.00	$ 0.07
Shares used in calculating basic net income (loss) per share	27,818	28,370
Diluted net income (loss) per share	$ 0.00	$ 0.06
Shares used in calculating diluted net income (loss) per share	27,818	29,382
Other Comprehensive Income (Loss)
Change in unrealized gains on short-term investments	1	1
Total Other Comprehensive Income (Loss)	1	1
Total Comprehensive Income (Loss)	$ (58)	$ 1,865