BENEFIT PLANS (Details) - USD ($)	3 Months Ended
	Jul. 31, 2020	Jul. 31, 2019
Defined Benefit Plan Disclosure [Line Items]
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	$ 90,000	$ 154,000
Share-based Compensation, Total	40,000	48,000
Non employee Individual of Board of Directors [Member]
Defined Benefit Plan Disclosure [Line Items]
Deferred Compensation Arrangement with Individual, Allocated Share-based Compensation Expense	$ 22,000	$ 23,000
Equity Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period	9,500	10,000
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number	32,334	41,667
Two Thousand Six Equity Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Stock Issued During Period, Shares, Restricted Stock Award, Gross	9,000	9,000
Restricted Stock [Member]
Defined Benefit Plan Disclosure [Line Items]
Share-based Compensation, Total	$ 18,000	$ 25,000
Restricted Stock [Member] | Equity Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Total	$ 94,000	$ 164,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years