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Note 17 – Share Based Awards (Tables)
3 Months Ended
Jul. 31, 2022
Share-Based Payment Arrangement [Abstract]  
[custom:ScheduleOfAssumptionsUsed1TableTextBlock]
    2022    2021 
Exercise Price       2.412.60 
Stock price on date of grant         2.412.60 
Risk-free interest rate          0.471.57% 
Dividend yield            
Expected term (years)    —      3.75 10.00 
Volatility         210.68214.17% 
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, 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   
Granted                               
Exercised                               
Forfeited or expired     (60,000     2.55                  
Outstanding as of July 31, 2022     3,634,142     2.16       8.31     1,608,791  
Exercisable as of July 31, 2022     2,312,975     $ 1.89       7.68     $ 1,334,291  
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, 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 
Granted            
Vested   (111,974)   2.57 
Forfeited            
Unvested and outstanding as of July 31, 2022   971,701   $2.59 
Schedule of Deferred Compensation Arrangement with Individual, Share-Based Payments [Table Text Block]
   2022  2021
General and administrative  $345,168   $219,601 
Research and development   144,798    56,480 
Operations   158,431    63,261 
Sales and marketing   107,074    44,744 
 Total  $755,471   $384,086