CONSOLIDATED BALANCE SHEETS (USD $) In Thousands	Sep. 30, 2011	Dec. 31, 2010
Current assets
Cash and cash equivalents	$ 550	$ 2,513
Accounts receivable	317	267
Unbilled receivables	225	704
Inventory	2,935	2,935
Prepaid expenses and other current assets	162	306
Total current assets	4,189	6,725
Property and equipment, net	51	126
Other assets	82	152
Total assets	4,322	7,003
Current liabilities
Accounts payable	579	794
Accrued expenses and other current liabilities	1,356	1,388
Deferred revenue	7,980	7,314
Current portion of long-term debt	1,767	2,779
Total current liabilities	11,682	12,275
Long-term debt, net of current portion	725	674
Warrants	70	220
Total liabilities	12,477	13,169
Commitments and contingencies
Stockholders' deficit
Preferred stock: par value $0.001 per share; 5,000,000 shares authorized at December 31, 2010 and September 30, 2011; no shares issued and outstanding at December 31, 2010 and September 30, 2011
Common stock: par value $0.001 per share; 120,000,000 shares authorized at December 31, 2010 and September 30, 2011; 86,557,606 shares issued and outstanding at December 31, 2010 and 87,233,989 shares issued and outstanding at September 30, 2011	87	87
Additional paid-in capital	181,164	180,180
Deficit accumulated during the development stage	(189,406)	(186,433)
Total stockholders' deficit	(8,155)	(6,166)
Total liabilities and stockholders' deficit	$ 4,322	$ 7,003