CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Thousands, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Revenues	$ 108,183	$ 74,025	$ 66,804
Cost of revenues:
Platform commissions, royalties and other	29,630	20,229	19,102
Impairment of prepaid royalties and guarantees	0	531	663
Amortization of intangible assets	3,783	5,447	4,226
Total cost of revenues	33,413	26,207	23,991
Gross profit	74,770	47,818	42,813
Operating expenses:
Research and development	54,275	39,073	25,180
Sales and marketing	20,893	14,607	12,140
General and administrative	14,744	14,002	13,108
Amortization of intangible assets	1,980	825	205
Restructuring charge	1,371	545	3,629
Impairment of goodwill	3,613	0	0
Total operating expenses	96,876	69,052	54,262
Loss from operations	(22,106)	(21,234)	(11,449)
Interest and other income/(expense), net:
Interest income/(expense)	21	(29)	(575)
Other income/(expense), net	(368)	776	(690)
Interest and other income/(expense), net	(347)	747	(1,265)
Loss before income taxes	(22,453)	(20,487)	(12,714)
Income tax benefit/(provision)	1,994	(614)	(709)
Net loss	$ (20,459)	$ (21,101)	$ (13,423)
Net loss per share - basic and diluted	$ (0.32)	$ (0.37)	$ (0.38)
Weighted average common shares outstanding - basic and diluted	64,318	57,518	35,439