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BENEFIT PLANS (Details) - Restricted Stock [Member]
9 Months Ended
Jan. 31, 2022
shares
Number of Shares  
Non-vested as of April 30, 2021 29,000
Granted during the nine months ended January 31, 2022 13,000
Vested during the nine months ended January 31, 2022 (20,500)
Forfeited during the nine months ended January 31, 2022 0
Non-vested as of January 31, 2022 21,500