CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current Assets:
Cash and cash equivalents	$ 92,463	$ 114,094
Short-term investments	49,748	55,694
Accounts receivable, net	5,677	4,737
Inventories, net	10,305	10,924
Prepaid expenses and other current assets	7,566	4,186
Total current assets	165,759	189,635
Property and equipment, net	884	833
Deferred financing costs, net	5,058	4,068
Restricted cash	2,970	2,580
Total assets	174,671	197,116
Current Liabilities:
Accounts payable	5,551	7,046
Deferred revenues	428	414
Warrant liability	1,490
Accrued interest	3,154	4,643
Other Current Liabilities	20,741	17,962
Total current liabilities	31,364	30,065
Convertible notes, net of discount of $27,225 at June 30, 2012 and $54,542 at December 31, 2011	95,216	175,458
Senior secured notes, net of discount of $51,103 at June 30, 2012	119,838
Other liabilities	1,462	3
Stockholders' Deficit:
Preferred stock-$.01 par value 4,000,000 shares authorized; no shares issued
Common stock-$.01 par value 150,000,000 shares authorized; 72,859,000 issued and outstanding at June 30, 2012 and 71,502,000 shares issued and outstanding at December 31, 2011	728	715
Additional paid-in-capital	394,077	408,463
Accumulated deficit	(468,180)	(417,603)
Accumulated other comprehensive income	166	15
Total stockholders' deficit	(73,209)	(8,410)
Total liabilities and stockholders' deficit	$ 174,671	$ 197,116