Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Cash flows from operating activities:
Net loss	$ (70,312)	$ (90,278)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	344	314
Accretion of debt discount	12,817	8,323
Gain on extinguishment of debt		(21,800)
Valuation change in warrant liability	(1,301)	2,785
Amortization of deferred financing costs	651	561
Stock compensation expense	3,256	5,165
Other	4	116
Changes in:
Accounts receivable, net	(2,478)	(82)
Inventories, net	3,064	252
Prepaid expenses and other current assets	(261)	(2,106)
Other assets	(693)	(808)
Accounts payable	(1,820)	(3,104)
Accrued interest on convertible notes	(168)	(1,661)
Other current liabilities	(5,055)	5,944
Deferred revenues	193	74
Other liabilities	(200)	1,709
Net cash used in operating activities	(61,959)	(94,596)
Cash flows from investing activities:
Proceeds from maturities of held-to-maturity securities	40,286	52,711
Purchases of held-to-maturity securities	(520)	(45,071)
Capital expenditures		(1,549)
Changes in restricted cash	775	(350)
Net cash provided by investing activities	40,541	5,741
Cash flows from financing activities:
Proceeds from issuance of common stock	139	412
Proceeds from issuance of debt, net of expenses		42,647
Net cash provided by financing activities	139	43,059
Effect of exchange rate changes	(612)	(111)
Net decrease in cash and cash equivalents	(21,891)	(45,907)
Cash and cash equivalents at beginning of period	50,332	114,094
Cash and cash equivalents at end of period	28,441	68,187
Other information:
Income tax paid
Interest paid	$ 8,380	$ 9,764