OTHER ASSETS - Additional Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2026	Jan. 31, 2025	Jan. 31, 2026	Jan. 31, 2025
OTHER ASSETS
Depreciation expense			$ 250,000	$ 130,000
Use rights
OTHER ASSETS
Amortization of lease cost	$ 8,000	$ 7,000	22,000	21,000
Depreciation expense	$ 37,000	$ 19,000	$ 108,000	$ 66,000