Annual report pursuant to Section 13 and 15(d)

Accounts Receivable - Narrative (Details)

v3.21.2
Accounts Receivable - Narrative (Details) - USD ($)
12 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Receivables [Abstract]    
Bad debt expense $ 2,268,540 $ 1,431,210