Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Consolidated net loss	$ (91,432)	$ (97,361)
Adjustments to reconcile consolidated net loss to net cash used in operating activities:
Depreciation	661	1,724
Impairment of fixed assets	2,349	13,344
Increase in fair value of Symphony Icon, Inc. purchase liability	5,145	518
Stock-based compensation	5,413	5,584
Amortization of debt issuance costs	380	37
Gain on disposal of property and equipment	(47)	(811)
Changes in operating assets and liabilities:
Decrease in accounts receivable	963	625
Increase in prepaid expenses and other current assets	(6,189)	(1,301)
(Increase) decrease in other assets	(469)	26
Increase in accounts payable and other liabilities	2,924	6,587
Decrease in deferred revenue	(846)	(136)
Net cash used in operating activities	(81,148)	(71,164)
Cash flows from investing activities:
Purchases of property and equipment	(664)	(46)
Proceeds from disposal of property and equipment	335	1,808
Purchases of investments	(82,554)	(20,651)
Maturities of investments	90,000	81,186
Net cash provided by investing activities	7,117	62,297
Cash flows from financing activities:
Proceeds from issuance of common stock	114	325
Repurchase of common stock	(357)	(887)
Repayment of debt borrowings	(1,379)	(1,268)
Other financing activities	61	(27)
Net cash used in financing activities	(1,561)	(1,857)
Net decrease in cash and cash equivalents	(75,592)	(10,724)
Cash and cash equivalents at beginning of period	137,266	37,499
Cash and cash equivalents at end of period	61,674	26,775
Supplemental disclosure of cash flow information:
Cash paid for interest	3,586	1,355
Supplemental disclosure of non-cash investing and financing activities:
Unrealized gain on investments	$ 121	$ 0