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BENEFIT PLANS - Additional information (Details) - USD ($)
1 Months Ended 3 Months Ended 6 Months Ended
Nov. 30, 2021
Oct. 31, 2024
Oct. 31, 2023
Oct. 31, 2024
Oct. 31, 2023
BENEFIT PLANS          
Employer contribution   $ 41,000   $ 63,000  
Stock-based compensation       $ 209,000 $ 173,000
Weighted-average remaining vesting period       3 years  
Reclassification of the balance of accumulated other comprehensive income (loss) to a benefit for income taxes   1,230,000   $ 1,230,000  
Simple internal revenue code retirement plan          
BENEFIT PLANS          
Company contributions     $ 20,000   38,000
Board of Directors Chairman          
BENEFIT PLANS          
Director compensation non-cash expense   22,000 23,000 45,000 45,000
Accrued compensation expense related to the deferred stock units       75,000 75,000
Equity plan | President and Chief executive officer          
BENEFIT PLANS          
Stock option issued during the year 50,000        
2016 Equity Plan | Board of Directors Chairman          
BENEFIT PLANS          
Non cash compensation expense   12,000 13,000 25,000 25,000
Restricted stock | Equity plan          
BENEFIT PLANS          
Stock-based compensation   86,000 $ 42,000 139,000 $ 103,000
Unrecognized compensation expense related to restricted shares   $ 397,000   $ 397,000