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Debt - Additional Information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Jan. 31, 2021
Nov. 30, 2017
Jul. 31, 2022
Jul. 31, 2021
Jul. 31, 2022
Jul. 31, 2021
Jan. 31, 2022
Jun. 30, 2020
Apr. 30, 2019
Nov. 30, 2018
Debt Instrument                    
Interest expense, debt     $ 0 $ 300,000 $ 0 $ 500,000        
Effective interest rate (as a percent)       3.90%   3.90%        
Fair value of common stock                 $ 400,000  
Credit Facility                    
Debt Instrument                    
Maximum borrowing capacity $ 40,000,000 $ 10,000,000             $ 10,000,000 $ 15,000,000
Borrowed line of credit $ 25,000,000                  
Fee payable on unused portion of line of credit (as a percent) 0.25%                  
Line of credit facility adjusted quick ratio 1.15                  
Repayment of outstanding principal amount             $ 25,000,000      
Line of credit outstanding     0   0          
Current borrowing capacity     $ 40,000,000   $ 40,000,000          
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% 0.50%                
Amended Loan | Loans Payable                    
Debt Instrument                    
Maximum borrowing capacity               $ 25,000,000    
Warrants issued to purchase common stock (in shares)                 105,350  
Exercise price of warrants or rights (in dollars per share)                 $ 7.48  
Warrants exercisable period (in years)                 10 years