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Stock-Based Compensation Plans - Summary of CRSU Plan Activity (Details) - shares
 12 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2021
Stock-Based Compensation Plans      
Number of Units Outstanding, CRSU (in shares),Beginning 24,428 38,628  
Weighted-Average Remaining Contractual Life, CRSU (Year) 1 year 4 months 24 days 1 year 4 months 24 days 1 year 6 months
Number of Units Granted, CRSU (in shares) 7,948 12,776  
Number of Units Vested and settled in cash, CRSU (in shares) (17,719) (26,755)  
Number of Units Forfeited, CRSU (in shares) (74) (221)  
Number of Units Outstanding, CRSU (in shares), Ending 14,583 24,428 38,628
Non-vested, CRSU (in shares) 14,583    
Non-vested, Weighted-Average Remaining Contractual Life, CRSU (Year) 1 year 4 months 24 days