INCOME TAXES (COMPONENTS OF DEFERRED TAX ASSETS AND LIABILITIES) (Details) - USD ($)	Apr. 30, 2015	Apr. 30, 2014
INCOME TAXES
Net operating loss carryforwards	$ 467,000	$ 646,000
Inventory valuation reserve	138,000	146,000
Loss on equity and impairment in investee	435,000	421,000
Tax credit carryforward		105,000
Other	231,000	88,000
Gross deferred income tax asset	1,271,000	1,406,000
Less valuation allowance	(435,000)	(421,000)
Net deferred income tax assets	$ 836,000	$ 985,000