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STOCKHOLDERS' EQUITY - Summary of Information about Stock Options Outstanding (Details)
12 Months Ended
Jan. 31, 2020
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number, Outstanding Shares | shares 39,311
Number, Exercisable Shares | shares 35,188
Exercisable Price Range $12.51 - $17.45  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, minimum $ 12.51
Range of Exercise Prices, maximum $ 17.45
Number, Outstanding Shares | shares 21,066
Weighted Average Remaining Contractual Life 6 months 21 days
Weighted Average Exercise Price $ 14.07
Number, Exercisable Shares | shares 21,066
Weighted Average Exercise Price, Exercisable $ 14.07
Exercisable Price Range $18.11 - $30.32  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, minimum 18.11
Range of Exercise Prices, maximum $ 30.32
Number, Outstanding Shares | shares 18,245
Weighted Average Remaining Contractual Life 2 years 6 months 3 days
Weighted Average Exercise Price $ 23.63
Number, Exercisable Shares | shares 14,122
Weighted Average Exercise Price, Exercisable $ 21.67