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STOCKHOLDERS' EQUITY - Summary of Information about Stock Options Outstanding (Details)
12 Months Ended
Jan. 31, 2019
$ / shares
shares
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Number, Outstanding Shares | shares 55,311
Number, Exercisable Shares | shares 47,066
Exercise Price Range $5.55 - $9.20  
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]  
Range of Exercise Prices, minimum $ 5.55
Range of Exercise Prices, maximum $ 9.20
Number, Outstanding Shares | shares 10,000
Weighted Average Remaining Contractual Life 3 months 4 days
Weighted Average Exercise Price $ 6.57
Number, Exercisable Shares | shares 10,000
Weighted Average Exercise Price, Exercisable $ 6.57
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 27,066
Weighted Average Remaining Contractual Life 1 year 6 months 7 days
Weighted Average Exercise Price $ 13.73
Number, Exercisable Shares | shares 27,066
Weighted Average Exercise Price, Exercisable $ 13.73
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 3 years 6 months 4 days
Weighted Average Exercise Price $ 23.63
Number, Exercisable Shares | shares 10,000
Weighted Average Exercise Price, Exercisable $ 18.11