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Description of Business and Summary of Significant Accounting Policies Net Income Per Share Table (Details) - USD ($)
3 Months Ended 12 Months Ended
Feb. 28, 2017
Feb. 28, 2019
Feb. 28, 2018
Weighted Average Number of Shares Outstanding Reconciliation [Abstract]      
Reconciling Items Which Impact Net Income   $ 0  
Weighted Average Number of Shares Outstanding, Basic 24,160,324 24,355,791 24,290,563
Weighted Average Number Diluted Shares Outstanding Adjustment 0 0 256,683
Weighted Average Number of Shares Outstanding, Diluted 24,160,324 24,355,791 24,547,246