Quarterly report pursuant to Section 13 or 15(d)

Long-term Debt (Details)

v3.21.2
Long-term Debt (Details) - USD ($)
Aug. 31, 2021
Nov. 05, 2018
Oct. 31, 2021
Jul. 31, 2021
Apr. 30, 2021
Debt Instrument [Line Items]          
Deferred financing costs     $ 117,857   $ 18,056
Warrant          
Debt Instrument [Line Items]          
Vesting period of warrant 5 years        
Credit Facility Agreement | Revolving Credit Facility          
Debt Instrument [Line Items]          
Line of credit, maximum borrowing capacity $ 5,000,000 $ 5,000,000      
Interest rate of debt (as a percent) 12.00% 12.00%      
Debt instrument, extension term 1 year        
Proceeds from lines of credit $ 5,000,000        
Deferred financing costs     0 $ 9,722 18,056
Line of credit, outstanding balance     $ 5,000,000   $ 0
Credit Facility Agreement | Revolving Credit Facility | Warrant          
Debt Instrument [Line Items]          
Number of securities called by warrants or rights (in shares) 50,000 92,049      
Vesting period of warrant 14 months        
Exercise price of warrants (in dollars per share) $ 5.89 $ 5.85      
Fair value of warrants outstanding $ 137,500 $ 255,071      
Warrant term   5 years