CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Statement of Cash Flows [Abstract]
Net income (loss)	$ (81,847)	$ (71,815)	$ (58,990)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	10,410	11,959	18,748
Stock-based compensation	4,698	5,204	7,468
Equity in net loss of Rhapsody	14,521	4,452	6,268
Lease exit and related charges	2,501	668	1,421
Deferred income taxes, net	(1,558)	(237)	676
Loss (gain) on sale of available for sale securities	159	(2,371)	(21,389)
Realized translation gain	(264)	(48)	(571)
Extinguishment of liability	0	(10,580)	0
Fair value of warrants, net of mark to market adjustments	(1,053)	0	0
Other	0	0	51
Net change in certain operating assets and liabilities:
Trade accounts receivable	(8,236)	8,732	8,442
Deferred costs, prepaid expenses and other assets	2,606	1,982	8,112
Accounts payable	(465)	(769)	321
Accrued and other liabilities	(10,454)	(7,421)	(20,436)
Net cash provided by (used in) operating activities	(68,982)	(60,244)	(49,879)
Cash flows from investing activities:
Purchases of equipment, software, and leasehold improvements	(1,319)	(2,460)	(7,727)
Proceeds from sale of available for sale securities	459	2,754	29,153
Purchases of short-term investments	(72,136)	(81,216)	(131,690)
Proceeds from sales and maturities of short-term investments	78,775	97,683	164,986
Decrease in restricted cash equivalents and investments	110	0	10,000
Increase in restricted cash equivalents and investments	0	0	(3,000)
Acquisitions, net of cash acquired	(161)	(733)	(22,480)
Advance to Rhapsody	(5,000)	0	0
Repayment from Rhapsody	5,000	0	0
Proceeds from the sale of Slingo and social casino business	10,000	0	0
Other	0	(467)	0
Net cash provided by (used in) investing activities	15,728	15,561	39,242
Cash flows from financing activities:
Proceeds from issuance of common stock (stock options and stock purchase plan)	426	812	594
Tax payments from shares withheld upon vesting of restricted stock	(85)	(407)	(1,201)
Payment of contingent consideration	0	(1,042)	(828)
Net cash provided by (used in) financing activities	341	(637)	(1,435)
Effect of exchange rate changes on cash and cash equivalents	(3,025)	(2,662)	109
Net increase (decrease) in cash and cash equivalents	(55,938)	(47,982)	(11,963)
Cash and cash equivalents, beginning of year	103,253	151,235	163,198
Cash and cash equivalents, end of year	47,315	103,253	151,235
Supplemental disclosure of cash flow information:
Cash received from income tax refunds	1,102	654	8,405
Cash paid for income taxes	1,491	1,882	4,600
Non-cash investing activities:
Increase (decrease) in accrued purchases of equipment, software, and leasehold improvements	(150)	(297)	335
Acquisition of intangible assets	$ 102	$ 0	$ 0