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Stock Based Compensation (Tables)
12 Months Ended
Feb. 29, 2020
Notes to Financial Statements  
Weighted-average Black-Scholes assumptions
   Fiscal Year Ended 
   February 29,
2020
   February 28,
2019
 
Expected life   1 - 8 years    8 years 
Risk free interest rate   1.58% - 2.05%    2.47% - 2.98% 
Expected volatility   27.46% - 32.24%    24.82% - 28.24% 
Expected dividend yield   0%    0%