OTHER ASSETS - Additional Information (Details)	12 Months Ended
	Apr. 30, 2023 USD ($) ft²	Apr. 30, 2022 USD ($)
Office building
OTHER ASSETS
Area of Land | ft²	7,000
Property and equipment | Right of use assets
OTHER ASSETS
Amortization of leased cost	$ 25,000	$ 70,000
Right of use assets
OTHER ASSETS
Depreciation expense associated with property and equipment	$ 46,000	$ 24,000