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Subsequent Events-Eldorado Transaction (Details) (USD $)
3 Months Ended 6 Months Ended 0 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2014
Aug. 31, 2014
Eldorado
Sep. 19, 2014
Subsequent Event
Eldorado
Sep. 19, 2014
Subsequent Event
Eldorado
Subsequent Event [Line Items]            
Common stock issued (shares)           3,978,573
Par value (usd per share)           $ 0.00001
Ownership percentage in equity method investment (percent)       17.0359%   8.60%
Unrealized holding loss $ 18,910 $ 0 $ 18,910   $ (8,200,000)