Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 82,565	$ 114,094
Short-term investments	48,408	55,694
Accounts receivable, net	5,171	4,737
Inventories, net	11,313	10,924
Prepaid expenses and other current assets	5,246	4,186
Total current assets	152,703	189,635
Property and equipment, net	742	833
Deferred financing costs, net	3,886	4,068
Restricted cash	2,780	2,580
Total assets	160,111	197,116
LIABILITIES AND STOCKHOLDERS' DEFICIT
Accounts payable	4,843	7,046
Deferred revenues	460	414
Accrued interest on Convertible Notes	1,912	4,643
Other current liabilities	17,007	17,962
Total current liabilities	24,222	30,065
Convertible Notes, net of discount of $52,889 at March 31, 2012 and $54,542 at December 31, 2011	177,111	175,458
Other liabilities	1	3
Commitments and contingencies
Stockholders' Deficit:
Preferred stock-$.01 par value; 4,000,000 shares authorized; no shares issued
Common stock-$.01 par value; 150,000,000 shares authorized; 72,402,000 issued and outstanding at March 31, 2012 and 71,502,000 issued and outstanding at December 31, 2011	724	715
Additional paid-in-capital	409,885	408,463
Accumulated deficit	(451,801)	(417,603)
Accumulated other comprehensive income	(31)	15
Total stockholders' deficit	(41,223)	(8,410)
Total liabilities and stockholders' deficit	$ 160,111	$ 197,116