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Note 18 - Stock Option Plans - Fair Value Assumptions (Details)
12 Months Ended
Jan. 31, 2022
Jan. 31, 2021
Risk free interest rate 0.72% 0.34%
Risk free interest rate 0.72% 0.37%
Expected volatility 63.00% 53.00%
Expected volatility 63.00% 64.00%
Expected dividend yield 0.00% 0.00%
Minimum [Member]    
Expected life (in years) (Year) 3 years 11 months 19 days 3 years 11 months 19 days
Maximum [Member]    
Expected life (in years) (Year) 5 years 11 months 19 days 5 years 11 months 19 days