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Debt - Additional Information (Details)
 3 Months Ended 6 Months Ended 12 Months Ended
Jan. 31, 2021
USD ($)
Jul. 31, 2023
USD ($)
Jul. 31, 2022
USD ($)
Jan. 31, 2022
USD ($)
Jun. 05, 2023
USD ($)
Jun. 30, 2020
USD ($)
Apr. 30, 2019
USD ($)
$ / shares
shares
Debt Instrument              
Interest expense, debt   $ 0 $ 0        
Fair value of common stock             $ 400,000
Credit Facility              
Debt Instrument              
Current borrowing capacity $ 40,000,000            
Borrowed line of credit       $ 25,000,000      
Repayment of outstanding principal amount       $ 25,000,000      
Line of credit facility adjusted quick ratio 1.15            
Fee payable on unused portion of line of credit (as a percent) 0.25%            
Line of credit outstanding         $ 0    
Credit Facility | Minimum              
Debt Instrument              
Line of credit facility termination fee (as a percent) 50.00%            
Credit Facility | Maximum              
Debt Instrument              
Line of credit facility termination fee (as a percent) 100.00%            
Credit Facility | Prime Rate              
Debt Instrument              
Variable rate (as a percent) 0.50%            
Amended Loan | Loans Payable              
Debt Instrument              
Maximum borrowing capacity           $ 25,000,000  
Warrants issued to purchase common stock (in shares) | shares             105,350
Exercise price of warrants or rights (in dollars per share) | $ / shares             $ 7.48
Warrants exercisable period (in years)             10 years