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BENEFIT PLANS - Maximum number of shares issued to employees that could be vested (Details)
 12 Months Ended
Apr. 30, 2022
$ / shares
shares
BENEFIT PLANS  
Number of Shares - Non-vested | shares 29,000
Number of Shares - Granted | shares 13,000
Number of Shares - Vested | shares (20,500)
Number of Shares - Forfeited | shares 0
Number of Shares - Non-vested | shares 21,500
Weighted Average Grant Date Fair Value Non-vested | $ / shares $ 6.18
Weighted Average Grant Date Fair Value Granted | $ / shares 11.50
Weighted Average Grant Date Fair Value Vested | $ / shares 6.61
Weighted Average Grant Date Fair Value Forfeited | $ / shares 0
Weighted Average Grant Date Fair Value Non-vested | $ / shares $ 8.98