Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Detail)

v3.22.1
Stockholders' Equity - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Deferred Stock Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized $ 0.6  
Share based compensation arrangement by share based payment award expected weighted average recognition period 1 year 3 months 18 days  
Stock Options [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Options granted 0  
Cancelled option awards 36,666  
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized $ 0.3  
Share based compensation arrangement by share based payment award expected weighted average recognition period 1 year 6 months  
Restricted Stock Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Awards granted 0  
Stock options and restricted stock units cancelled 0  
Restricted Stock Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized $ 0.6  
Share based compensation arrangement by share based payment award expected weighted average recognition period 1 year 3 months 18 days  
Performance Stock Unit [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Employee service share-based compensation, nonvested awards, total compensation cost not yet recognized $ 0.1  
Share based compensation arrangement by share based payment award expected weighted average recognition period 1 year 2 months 12 days  
2011 Compensation and Incentive Plan [Member] | Stock Compensation Plan | Board of Directions    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, number of shares authorized 4,896,878  
Share-based compensation arrangement by share-based payment award, number of shares purchased for award 2,396,878  
Share-based compensation arrangement by share-based payment award, number of shares available for grant 1,620,584  
2011 Compensation and Incentive Plan [Member] | Deferred Stock Units [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by Share-based payment award, vesting period 1 year  
Compensation And Incentive Plan 2021 [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, Description Option awards may be granted at an exercise price per share of not less than 100% of the fair market value per common share on the date of the grant and not less than 110% of the fair market value per common share on the date of the grant with respect to ISOs granted to employees owning stock possessing more than 10% of the total combined voting power of all classes of stock of the Company.  
Share-based compensation arrangement by share based payment award, Option award expiration period 10 years  
Compensation And Incentive Plan 2021 [Member] | Minimum [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by Share-based payment award, vesting period 1 year  
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent 100.00%  
Compensation And Incentive Plan 2021 [Member] | Maximum {Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by Share-based payment award, vesting period 3 years  
Compensation And Incentive Plan 2021 [Member] | ISO [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Combined voting power limit 10%  
Compensation And Incentive Plan 2021 [Member] | ISO [Member] | Minimum [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent 110%  
2015 Employee Stock Purchase Plan [Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, number of shares available for grant 1,075,024  
Share-based compensation arrangement by share-based payment award, Description On each purchase date, eligible employees can purchase stock at a price per share equal to 85% of the closing price of the Company’s common stock on the exercise date, but no less than par value.  
Share-based compensation arrangement by share-based payment award, purchase price of common stock, percent 85.00%  
Shares purchased under ESPP 0 0
2015 Employee Stock Purchase Plan [Member] | Maximum {Member]    
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]    
Share-based compensation arrangement by share-based payment award, number of shares authorized 1,150,000