Condensed Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Cash and cash equivalents	$ 58,559	$ 28,759
Restricted cash	2,500	5,000
Accounts receivable, net of allowance for doubtful accounts of $0.1 million at March 31, 2012 and December 31, 2011	9,065	11,371
Inventories, net	6,946	6,323
Other current assets	3,101	2,396
Total current assets	80,171	53,849
Property and equipment, net	10,468	7,806
Restricted cash	3,200	3,200
Other long term assets	283	482
Total assets	94,122	65,337
LIABILITIES AND STOCKHOLDERS' EQUITY
Accounts payable	9,232	8,543
Accrued expenses	6,127	6,519
Deferred revenue	2,037	4,137
Convertible debt, at carrying value (face value of $34.9 million at March 31, 2012 and December 31, 2011; maturity date of April 2027, and early put option dates of April 2, 2012, 2017 and 2022)	34,851	34,851
Current liabilities of discontinued operations	363	436
Total current liabilities	52,610	54,486
Other long term liabilities	1,198	906
Total liabilities	53,808	55,392
Stockholders' equity:
Preferred stock-$0.001 par value; 5,000 shares authorized, no shares issued and outstanding at March 31, 2012 and December 31, 2011	0	0
Common stock-$0.001 par value; 245,000 shares authorized at March 31, 2012 and December 31, 2011; 12,610 and 12,611 shares issued and outstanding at March 31, 2012 and December 31, 2011	12	12
Additional paid-in capital	611,028	610,781
Accumulated deficit	(570,726)	(600,848)
Total stockholders' equity	40,314	9,945
Total liabilities and stockholders' equity	$ 94,122	$ 65,337