Consolidated Balance Sheets (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 34,875	$ 28,759
Restricted cash	2,500	5,000
Accounts receivable, net of allowance for doubtful accounts of $0.1 million at December 31, 2012 and 2011	10,577	11,371
Inventories, net	5,311	6,323
Other current assets	3,039	2,499
Total current assets	56,302	53,952
Property and equipment, net	36,798	15,611
Restricted cash	0	3,200
Other long term assets	676	509
Total assets	93,776	73,272
Current liabilities:
Accounts payable	7,573	8,543
Accrued expenses	5,693	6,627
Deferred revenue	1,929	4,137
Convertible debt, at face value	0	34,851
Other current liabilities	428	692
Total current liabilities	15,623	54,850
Long term debt, at carrying value, net of current portion (face value of $25.2 million at December 31, 2012)	24,861	0
Lease financing obligation, net of current portion	22,020	7,135
Other long term liabilities	619	1,160
Total liabilities	63,123	63,145
Stockholders' equity:
Preferred stock - $0.001 par value; 5,000 shares authorized, no shares issued and outstanding at December 31, 2012 and 2011	0	0
Common stock - $0.001 par value; 245,000 shares authorized at December 31, 2012 and 2011; 12,783 and 12,611 shares issued and outstanding at December 31, 2012 and 2011	13	12
Additional paid-in capital	612,884	610,572
Accumulated deficit	(582,244)	(600,457)
Total stockholders' equity	30,653	10,127
Total liabilities and stockholders' equity	$ 93,776	$ 73,272