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Stock-based Compensation and Treasury Stock (Details) - USD ($)
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2020
Jan. 31, 2020
Jan. 31, 2019
Jan. 31, 2021
Jan. 31, 2020
Oct. 31, 2020
Mar. 12, 2020
Class of Stock [Line Items]              
Authorized amount under share repurchase program             $ 10,000,000
Management              
Class of Stock [Line Items]              
Shares exchanged (in shares)       46,993 11,314    
Fair value of common stock for the payment of payroll taxes associated with the vesting of shares under stock-based compensation programs       $ 701,000 $ 213,000    
Stock-Based Compensation | Minimum              
Class of Stock [Line Items]              
Vesting period       2 years      
Stock-Based Compensation | Management              
Class of Stock [Line Items]              
Shares granted (in shares)           0  
Stock-Based Compensation | Key Executives              
Class of Stock [Line Items]              
Vesting period       3 years      
Shares granted (in shares) 95,000            
Common stock per share (in dollars per share) $ 15.26            
Cost from stock compensation       $ 1,450,000      
Stock-Based Compensation | Key Executives | Minimum              
Class of Stock [Line Items]              
Vesting period       3 years      
Stock-Based Compensation | Key Executives | Maximum              
Class of Stock [Line Items]              
Vesting period       5 years      
Stock-Based Compensation | Non-Employee Directors              
Class of Stock [Line Items]              
Shares granted (in shares)   27,815 17,841        
Share-based compensation expense       $ 469,000 $ 358,000