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Notes Payable - Summary of notes payable and accrued interest (Parentheticals) (Details) (Vulcan - Note payable and accrued interest, USD $)
Mar. 31, 2014
Dec. 31, 2013
Vulcan - Note payable and accrued interest
   
Debt Instrument [Line Items]    
Net of debt discount $ 0 $ 100,000