Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net loss	$ (49,878)	$ (50,577)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	242	215
Accretion of debt discount	8,410	4,505
Gain on extinguishment of debt		(21,800)
Valuation change in warrant liability	(1,497)	(3,792)
Amortization of deferred financing costs	430	287
Stock compensation expense	2,016	3,980
Other	4	255
Changes in:
Accounts receivable, net	(3,412)	(940)
Inventories, net	2,750	619
Prepaid expenses and other current assets	582	(3,541)
Other assets	46	(40)
Accounts payable	(10)	(1,495)
Accrued interest on convertible notes	4	(1,489)
Other current liabilities	(4,837)	2,794
Deferred revenues	900	14
Other liabilities	(134)	511
Net cash used in operating activities	(44,384)	(70,494)
Cash flows from investing activities:
Proceeds from maturities of held-to-maturity securities	33,386	35,875
Purchases of held-to-maturity securities	(568)	(29,929)
Capital expenditures		(279)
Changes in restricted cash		(350)
Net cash provided by investing activities	32,818	5,317
Cash flows from financing activities:
Proceeds from issuance of common stock	139	337
Proceeds from issuance of debt, net of expenses		43,058
Net cash provided by financing activities	139	43,395
Effect of exchange rate changes	(562)	151
Net decrease in cash and cash equivalents	(11,989)	(21,631)
Cash and cash equivalents at beginning of period	50,332	114,094
Cash and cash equivalents at end of period	38,343	92,463
Other information:
Income tax paid
Interest paid	$ 5,472	$ 5,470