Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities:
Consolidated net loss	$ (97,361)	$ (86,712)
Adjustments to reconcile consolidated net loss to net cash used in operating activities:
Depreciation	1,724	2,194
Impairment of fixed assets	13,344	0
Increase in fair value of Symphony Icon, Inc. purchase liability	518	3,079
Stock-based compensation	5,584	5,728
Gain on disposal of property and equipment	(811)	0
Changes in operating assets and liabilities:
Decrease in accounts receivable	625	483
Increase in prepaid expenses and other current assets	(1,301)	(908)
Decrease in other assets	63	62
Increase in accounts payable and other liabilities	6,587	6,684
Increase (decrease) in deferred revenue	(136)	52
Net cash used in operating activities	(71,164)	(69,338)
Cash flows from investing activities:
Purchases of property and equipment	(46)	(1,506)
Proceeds from disposal of property and equipment	1,808	108
Purchases of investments	(20,651)	(80,954)
Maturities of investments	81,186	142,125
Net cash provided by investing activities	62,297	59,773
Cash flows from financing activities:
Proceeds from issuance of common stock	325	874
Repurchase of common stock	(887)	(873)
Repayment of debt borrowings	(1,268)	(1,167)
Other financing activities	(27)	(111)
Net cash used in financing activities	(1,857)	(1,277)
Net decrease in cash and cash equivalents	(10,724)	(10,842)
Cash and cash equivalents at beginning of period	37,499	30,423
Cash and cash equivalents at end of period	26,775	19,581
Supplemental disclosure of cash flow information:
Cash paid for interest	1,355	1,437
Supplemental disclosure of non-cash investing and financing activities:
Unrealized gain on investments	$ 0	$ 15