CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Cash flows from operating activities:
Net loss	$ (118,312)	$ (102,027)	$ (73,109)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	448	392	418
Accretion of debt discount	12,312	5,722
Gain on extinguishment of debt	(21,800)
Valuation change in warrant liability	(2,347)		16,807
Amortization of deferred financing costs	770	620
Stock compensation expense	6,932	7,900	7,784
Deferred income taxes		(22,717)
Other	(2)
Changes in:
Accounts receivable, net	396	(3,828)	(557)
Inventories, net	6,599	(7,784)	(2,555)
Recoverable income taxes			2,006
Prepaid expenses and other current assets	(6)	(1,079)	(1,013)
Other assets	(443)	4	11
Accounts payable	(3,611)	5,445	(6,314)
Accrued interest on debt	(1,493)	4,643
Other current liabilities	3,633	1,939	3,550
Deferred revenues	166	(14)	355
Other liabilities	2,013	(6,096)	190
Net cash used in operating activities	(114,745)	(116,880)	(52,427)
Cash flows from investing activities:
Proceeds from maturities of held-to-maturity securities	66,450	30,413	13,348
Purchases of held-to-maturity securities	(56,705)	(66,038)	(33,417)
Capital expenditures	(1,678)	(416)	(234)
Changes in restricted cash	150	(1,300)
Net cash provided by (used in) investing activities	8,217	(37,341)	(20,303)
Cash flows from financing activities:
Proceeds from issuance of debt	42,647	222,697
Proceeds from issuance of common stock	502	803	2,130
Proceeds from warrant exercises			8,501
Repurchase and retirement of common stock			(1,282)
Net cash provided by financing activities	43,149	223,500	9,349
Effect of exchange rate changes	(383)	24
Net (decrease) increase in cash and cash equivalents	(63,762)	69,303	(63,381)
Cash and cash equivalents at beginning of period	114,094	44,791	108,172
Cash and cash equivalents at end of period	50,332	114,094	44,791
Other information:
Income tax paid
Interest paid	12,330	5,395	79
Reclassification from warrant liability to APIC on exercise of warrants			$ 41,046