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Debt (Details 3) (USD $)
6 Months Ended 0 Months Ended
Aug. 31, 2014
Mar. 01, 2014
MBFC Loan
Aug. 31, 2014
MBFC Loan
Long-term debt      
Face amount     $ 37,610,000
Principal payment made 76,900,000 1,900,000  
Outstanding principal payable on March 1, 2015     1,900,000
Outstanding principal payable on March 1, 2016     3,800,000
Outstanding principal payable on March 1, 2017     5,700,000
Outstanding principal payable on March 1, 2018     1,900,000
Outstanding principal payable on March 1, 2019     1,900,000
Outstanding principal payable on March 1, 2020     1,900,000
Outstanding principal payable on March 1, 2021     1,900,000
Outstanding principal payable on March 1, 2022     1,900,000
Outstanding principal payable on March 1, 2023     $ 14,810,000