CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 50,332	$ 114,094
Short-term investments	45,949	55,694
Accounts receivable, net	4,341	4,737
Inventories, net	4,325	10,924
Prepaid expenses and other current assets	4,367	4,186
Total current assets	109,314	189,635
Property and equipment, net	2,050	833
Deferred financing costs, net	4,969	4,068
Restricted cash and other assets	2,873	2,580
Total assets	119,206	197,116
Current Liabilities:
Accounts payable	3,435	7,046
Deferred revenues	580	414
Warrant liability	2,935
Accrued interest	3,150	4,643
Other current liabilities	21,516	17,962
Total current liabilities	31,616	30,065
Convertible notes, net of discount of $25,354 at December 31, 2012 and $54,542 at December 31, 2011	97,087	175,458
Senior secured notes, net of discount of $45,114 at December 31, 2012	125,827
Other liabilities	2,973	3
Stockholders' Deficit:
Preferred stock-$.01 par value 4,000,000 shares authorized; no shares issued
Common stock-$.01 par value 150,000,000 shares authorized; 73,083,000 shares issued and outstanding at December 31, 2012 and 71,502,000 shares issued and outstanding at December 31, 2011	731	715
Additional paid-in-capital	397,191	408,463
Accumulated deficit	(535,915)	(417,603)
Accumulated other comprehensive (loss) income	(304)	15
Total stockholders' deficit	(138,297)	(8,410)
Total liabilities and stockholders' deficit	$ 119,206	$ 197,116