Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Consolidated net loss	$ (55,054)	$ (55,799)
Adjustments to reconcile consolidated net loss to net cash used in operating activities:
Depreciation	1,618	2,219
Increase in fair value of Symphony Icon, Inc. purchase liability	1,741	4,243
Stock-based compensation	3,978	3,313
Changes in operating assets and liabilities:
Decrease in accounts receivable	364	168
Increase in prepaid expenses and other current assets	(335)	(2,834)
Decrease in other assets	44	48
Increase (decrease) in accounts payable and other liabilities	2,251	(317)
Decrease in deferred revenue	(10)	0
Net cash used in operating activities	(45,403)	(48,959)
Cash flows from investing activities:
Purchases of property and equipment	(1,238)	(329)
Proceeds from disposal of property and equipment	102	1
Purchases of investments	(80,954)	(151,776)
Maturities of investments	121,623	49,384
Net cash provided by (used in) investing activities	39,533	(102,720)
Cash flows from financing activities:
Proceeds from issuance of common stock	347	276
Repurchase of common stock	(873)	(285)
Repayment of debt borrowings	(773)	(706)
Other financing activities	0	(136)
Net cash used in financing activities	(1,299)	(851)
Net decrease in cash and cash equivalents	(7,169)	(152,530)
Cash and cash equivalents at beginning of period	30,423	186,309
Cash and cash equivalents at end of period	23,254	33,779
Supplemental disclosure of cash flow information:
Cash paid for interest	962	1,029
Supplemental disclosure of non-cash investing and financing activities:
Unrealized gain (loss) on investments	$ 8	$ (41)