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Note 16 – Common Stock (Tables)
 12 Months Ended
Apr. 30, 2024
Equity [Abstract]  
Schedule of Common Stock Outstanding Roll Forward [Table Text Block]
Description of Shares  Shares Issued
Shares outstanding as of April 30, 2022   53,748,735 
Vesting of restricted stock to employees, net of shares withheld of 273,874 to pay taxes and 9,000 to repay a Note   653,308 
Vesting of restricted stock to Board of Directors   116,507 
Vesting of restricted stock to consultants   9,683 
Shares issued for services   39,832 
Shares outstanding as of April 30, 2023   54,568,065 
Vesting of restricted stock to employees, net of shares withheld of 27,189 to pay taxes   192,742 
Vesting of restricted stock to Board of Directors   252,214 
Vesting of restricted stock to consultants   1,761 
Conversion of preferred stock   818,334 
Issuance of common stock through ATM facilities   53,235 
Issuance of common stock through public offering   18,400,000 
Exercise of stock options   3,000 
Shares outstanding as of April 30, 2024   74,289,351