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Related Party Transactions (Details) - USD ($)
12 Months Ended
Apr. 30, 2023
Apr. 30, 2022
Board member | Consulting agreement    
Long-Term Incentive Awards    
Amount paid to related party $ 76,000 $ 36,000
SoftBank | Design and Development Agreement    
Long-Term Incentive Awards    
Maximum net value   51,200,000
Revenues   $ 43,325,000