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Line of Credit (Details) (Contango [Member], Revolving Credit Facility [Member], USD $)
In Millions, unless otherwise specified
Nov. 10, 2011
Contango [Member] | Revolving Credit Facility [Member]
 
Line of Credit Facility [Line Items]  
Line of credit facility maximum borrowing capacity $ 1.0
Line of credit facility interest rate 10.00%