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Transactions With Related Parties - Manning Agency Agreements (Details) (USD $)
6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Dec. 31, 2012
Related Party Transaction [Line Items]      
Due to related parties $ 542,830   $ 84,705
Crewcare
     
Related Party Transaction [Line Items]      
Manning expenses 190,192 158,350  
Due to related parties $ 542,830   $ 84,705