CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Cash flows from operating activities:
Net loss	$ (24,446)	$ (34,198)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	128	101
Accretion of debt discount	4,130	1,653
Valuation change in warrant liability	(745)
Amortization of deferred financing costs	213	173
Stock compensation expense	960	1,218
Other		(6)
Changes in:
Accounts receivable, net	517	(434)
Inventories, net	1,944	(389)
Prepaid expenses and other current assets	(1,127)	(1,047)
Other assets	(25)
Accounts payable	(926)	(2,203)
Accrued interest on convertible notes	(172)	(2,731)
Other current liabilities	(7,182)	(940)
Deferred revenues	(281)	46
Other liabilities	(65)	(2)
Net cash used in operating activities	(27,077)	(38,759)
Cash flows from investing activities:
Proceeds from maturities of held-to-maturity securities	13,987	18,321
Purchases of held-to-maturity securities	(686)	(11,035)
Capital expenditures	6	(23)
Changes in restricted cash		(200)
Net cash provided by investing activities	13,307	7,063
Cash flows from financing activities:
Proceeds from issuance of common stock	139	213
Net cash provided by financing activities	139	213
Effect of exchange rate changes	(560)	(46)
Net decrease in cash and cash equivalents	(14,191)	(31,529)
Cash and cash equivalents at beginning of period	50,332	114,094
Cash and cash equivalents at end of period	36,141	82,565
Other information:
Income tax paid
Interest paid	$ 2,908	$ 5,464