Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Details)

v3.21.2
Debt - Narrative (Details) - USD ($)
Aug. 31, 2021
Nov. 05, 2018
Jul. 31, 2021
Apr. 30, 2021
Debt Instrument [Line Items]        
Debt issue cost, net     $ 9,722 $ 18,056
Credit Facility Agreement | Revolving Credit Facility        
Debt Instrument [Line Items]        
Line of credit, maximum borrowing capacity   $ 5,000,000    
Interest rate of debt (as a percent)   12.00%    
Line of credit, outstanding balance     $ 0 $ 0
One-time upfront facility fee   $ 100,000    
One-time extension fee (as a percent)   2.00%    
Number of securities called by warrants or rights (in shares)   92,049    
Warrant term   5 years    
Exercise price of warrants (in dollars per share)   $ 5.85    
Fair value of warrants outstanding   $ 255,071    
Credit Facility Agreement | Revolving Credit Facility | Subsequent Event        
Debt Instrument [Line Items]        
Line of credit, maximum borrowing capacity $ 5,000,000      
Interest rate of debt (as a percent) 12.00%      
Debt instrument, extension term 1 year      
Proceeds from lines of credit $ 5,000,000      
Number of securities called by warrants or rights (in shares) 50,000      
Exercise price of warrants (in dollars per share) $ 5.89