BALANCE SHEETS (USD $) In Thousands	Jun. 30, 2011	Dec. 31, 2010
Current assets:
Cash and cash equivalents	$ 3,453	$ 8,055
Prepaid expenses and other current assets	319	481
Total current assets	3,772	8,536
Equipment, less accumulated depreciation of $704 and $682 at June 30, 2011 and December 31, 2010, respectively	49	71
Intangible assets, less accumulated amortization of $426 and $364 at June 30, 2011 and December 31, 2010, respectively	1,137	1,065
Other assets	5	5
Total assets	4,963	9,677
Current liabilities:
Accounts payable and accrued expenses	3,375	2,302
Notes payable, net of discount	6,078	4,695
Total current liabilities	9,453	6,997
Derivative financial instruments, at estimated fair value - warrants	4,174	6,840
Total liabilities	13,627	13,837
Commitments and contingencies
Preferred stock; 5,000,000 shares authorized
Common Stock: $0.001 par value; 100,000,000 shares authorized, 27,997,701 and 27,918,148 issued and outstanding at June 30, 2011 and December 31, 2010, respectively	28	28
Additional paid-in capital	58,003	57,474
Deficit accumulated during the development stage	(66,796)	(61,763)
Total stockholders' deficit	(8,664)	(4,160)
Total liabilities and stockholders' deficit	4,963	9,677
Preferred Stock Series A
Preferred stock; 5,000,000 shares authorized
Preferred Stock
Preferred Stock Series C
Preferred stock; 5,000,000 shares authorized
Preferred Stock	28	28
Preferred Stock Series D
Preferred stock; 5,000,000 shares authorized
Preferred Stock	$ 73	$ 73