Quarterly report pursuant to Section 13 or 15(d)

Debt (Details)

v3.22.0.1
Debt (Details) - USD ($)
3 Months Ended
Aug. 31, 2021
Nov. 05, 2018
Oct. 31, 2021
Jan. 31, 2022
Apr. 30, 2021
Debt Instrument [Line Items]          
Deferred financing costs       $ 88,393 $ 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      
Interest rate of debt (as a percent)   12.00%      
Debt instrument, extension term 1 year        
Proceeds from lines of credit $ 5,000,000        
Deferred financing costs       0 18,056
Line of credit, outstanding balance       $ 5,000,000 $ 0
Write off of unamortized original issue discount and debt issuance costs     $ 9,722    
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) $ 5.85 $ 5.85      
Fair value of warrants outstanding $ 137,500 $ 255,071      
Warrant term   5 years