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Condensed Balance Sheets (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 12,442 $ 17,974
Prepaid expenses and other current assets 557 266
Total current assets 12,999 18,240
Property and equipment, net 1,102 1,075
Other long-term assets 130 130
Total assets 14,231 19,445
Current liabilities:    
Accounts payable 605 1,010
Accrued expenses 1,056 1,498
Accrued disposition costs 1,216 1,082
Convertible notes payable to related parties, net of discount 239 103
Total current liabilities 3,116 3,693
Stockholders' equity:    
Common stock 2,004 2,002
Additional paid-in capital 178,840 173,989
Accumulated deficit (169,729) (160,239)
Total stockholders' equity 11,115 15,752
Total liabilities and stockholders' equity $ 14,231 $ 19,445