CONDENSED CONSOLIDATED BALANCE SHEETS (USD $) In Thousands, unless otherwise specified	Jun. 30, 2012	Dec. 31, 2011
Current assets:
Cash and cash equivalents	$ 13,130	$ 6,397
Prepaid expenses and other current assets	85	104
Total current assets	13,215	6,501
Property and equipment, net	4	6
Restricted cash	69	69
Intangible assets, net	34	36
Total assets	13,322	6,612
Current liabilities:
Accounts payable	246	384
Accrued expenses	1,254	1,551
Accrued dividends payable	80	80
Deferred revenue	200	200
Total current liabilities	1,780	2,215
Total liabilities	1,780	2,215
Commitments and contingencies (Note 9)
Stockholders' equity (deficit):
Undesignated stock, $0.01 par value; 20,000,000 shares authorized, 8,001,000 designated at June 30, 2012 and December 31, 2011
Series A 12% convertible preferred stock; 5,000,000 shares authorized, 1,562,500 issued and outstanding at June 30, 2012 and December 31, 2011	632	632
Common stock, $0.001 par value; 50,000,000 shares authorized at June 30, 2012 and December 31, 2011, 15,819,346 and 12,919,538 issued and outstanding at June 30, 2012 and December 31, 2011, respectively	16	13
Additional paid-in capital	78,583	66,367
Deficit accumulated during the development stage	(74,325)	(69,137)
Total stockholders' equity (deficit)	4,906	(2,125)
Total liabilities, redeemable convertible preferred stock and stockholders' equity (deficit)	13,322	6,612
Series B-1 12% redeemable convertible preferred stock
Current liabilities:
Convertible preferred stock, value	1,689	1,681
Series B-2 12% redeemable convertible preferred stock
Current liabilities:
Convertible preferred stock, value	2,793	2,687
Series C super dividend convertible preferred stock
Current liabilities:
Convertible preferred stock, value	$ 2,154	$ 2,154