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BENEFIT PLANS - Additional information (Details) - USD ($)
1 Months Ended 3 Months Ended 9 Months Ended
Nov. 30, 2021
Jan. 31, 2025
Jan. 31, 2024
Jan. 31, 2025
Jan. 31, 2024
BENEFIT PLANS          
Stock-based compensation       $ 331,000 $ 276,000
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  
401(k) plan          
BENEFIT PLANS          
Employer contribution   $ 31,000   94,000  
Contributions utilized   92,000      
Simple IRA plan          
BENEFIT PLANS          
Employer contribution     $ 26,000   64,000
Board of Directors Chairman          
BENEFIT PLANS          
Director compensation non-cash expense   23,000 23,000 68,000 68,000
Accrued compensation expense related to the deferred stock units       8,000 8,000
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   13,000 13,000 38,000 38,000
Restricted stock | Equity plan          
BENEFIT PLANS          
Stock-based compensation   88,000 $ 67,000 227,000 $ 170,000
Unrecognized compensation expense related to restricted shares   $ 311,000   $ 311,000