INCOME TAXES (Details Textual) - USD ($)	3 Months Ended		4 Months Ended	9 Months Ended		12 Months Ended
	Jan. 31, 2019	Jan. 31, 2018	Apr. 30, 2018	Jan. 31, 2019	Jan. 31, 2018	Apr. 30, 2019	Apr. 30, 2017
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent							34.00%
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount		$ 3,259,000
Increase (Decrease) in Income Taxes					$ 3,057,000
Unrecognized Tax Benefits		$ 58,000			$ 58,000		$ 58,000
Effective Income Tax Rate Reconciliation, Percent		35.50%			32.50%
Scenario, Plan [Member]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent			29.70%			21.00%
Scenario, Forecast [Member]
Increase (Decrease) in Income Taxes	$ 202,000			$ 202,000
Effective Income Tax Rate Reconciliation, Percent	27.70%			32.50%