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Contingencies Contingencies (Details) - USD ($)
3 Months Ended 12 Months Ended
Feb. 28, 2019
Feb. 28, 2017
Feb. 28, 2019
Feb. 28, 2018
Contingencies [Abstract]        
Payments to Acquire Intangible Assets $ 2,600 $ 0 $ 2,600,000 $ 0