Annual report pursuant to Section 13 and 15(d)

COMMON STOCK TRANSACTIONS (Details - Nonvested Option activity)

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COMMON STOCK TRANSACTIONS (Details - Nonvested Option activity) - Restricted Stock [Member] - $ / shares
12 Months Ended
Apr. 30, 2022
Apr. 30, 2021
Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]    
Beginning balance 2,933 3,067
Beginning balance $ 10.05 $ 82.76
Granted 6,738 6,733
Granted $ 6.80 $ 17.01
Vested (6,738) (6,867)
Vested $ 10.09 $ 39.61
Forfeited 0 0
Ending balance 2,933 2,933
Ending balance $ 2.50 $ 10.05