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Related Parties (Details) (Callisto, USD $)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Related parties    
Ownership percentage of outstanding shares owned by majority shareholder 34.00%  
Balances due from Callisto Pharmaceuticals, Inc.    
Rent, utilities and property taxes $ 123,000 $ 90,000
Insurance and other facilities related overhead 344,000 250,000
Independent accountants and legal 935,000 510,000
Financial printer and transfer agent fees 427,000 217,000
Salaries and consulting fees 344,000 289,000
Income taxes 325,000  
Merger fairness opinion 270,000  
Working capital advances, net of repayments 538,000 186,000
Total due from Callisto 3,305,636 1,542,000
Unsecured promissory note
   
Related parties    
Interest rate (as a percent) 6.00%  
Interest income earned $ 148,000 $ 84,000