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Note 17 – Share Based Awards (Tables)
12 Months Ended
Apr. 30, 2022
Share-Based Payment Arrangement [Abstract]  
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    2022    2021 
Exercise Price  1.692.82   2.013.95 
Stock price on date of grant   1.69 2.82    2.013.95 
Risk-free interest rate   0.471.91%    0.381.66% 
Dividend yield            
Expected term (years)    3.75 10.00    5.87 10.00 
Volatility    210.68273.46%    88.60 91.44% 
Disclosure of Share-Based Compensation Arrangements by Share-Based Payment Award [Table Text Block]
Options   Shares   Weighted-Average Exercise Price   Weighted-Average Remaining Contractual Term   Aggregate Intrinsic Value
                                 
Outstanding as of April 30, 2020     1,597,475     $ 1.10                  
Granted     600,000       3.63                  
Exercised                                  
Forfeited or expired                                  
Outstanding as of April 30, 2021     2,197,475     1.79       8.68        4,943,870   
Granted     1,681,000       2.58                  
Exercised     (150,000     2.49                  
Forfeited or expired     (34,333     2.11                  
Outstanding as of April 30, 2022     3,694,142     2.17       8.56     1,407,545  
Exercisable as of April 30, 2022     2,094,642     $ 1.90       7.91     $ 1,058,620  
Share-Based Payment Arrangement, Restricted Stock Unit, Activity [Table Text Block]
Restricted Stock  Shares  Weighted Average Grant-Date Fair Value Per Share
Unvested and outstanding as of April 30, 2020        $   
Granted   1,000,000    2.69 
Vested   (312,500)   2.69 
Forfeited            
Unvested and outstanding as of April 30, 2021   687,500    2.69 
Granted   995,659    2.55 
Vested   (599,484)   2.64 
Forfeited            
Unvested and outstanding as of April 30, 2022   1,083,675   $2.59 
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block]
   2022  2021
General and administrative  $1,521,951   $1,688,025 
Research and development   516,456    1,269,987 
Operations   783,781    220,048 
Sales and marketing   469,447    210,156 
 Total  $3,291,635   $3,388,216