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Pro forma results of acquisitions (Details) - USD ($) | 12 Months Ended
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Apr. 30, 2022 | Apr. 30, 2021
Series Of Individually Immaterial Business Acquisitions 1 [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Revenues | $ 4,550,980 | $ 2,112,042
Net (Loss) Income | (8,604,139) | (13,263,942)
Series Of Individually Immaterial Business Acquisitions 3 [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Revenues | 312,023 | 303,631
Net (Loss) Income | (886,757) | (906,478)
Series Of Individually Immaterial Business Acquisitions 4 [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Revenues | 1,878,007 | 979,344
Net (Loss) Income | (4,201,408) | (3,283,309)
Series of Individually Immaterial Business Acquisitions [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Revenues | 6,741,010 | 8,585,987
Net (Loss) Income | $ (13,692,304) | (17,213,774)
Series Of Individually Immaterial Business Acquisitions 2 [Member] |  |
Restructuring Cost and Reserve [Line Items] |  |
Revenues |  | 5,190,970
Net (Loss) Income |  | $ 239,955

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