NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range - $ / shares	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Number Outstanding (in Shares)	342,840	420,763	397,885
Warrants Oustanding, Weighted Average Remaining Contractual Life	1 year 142 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.59	$ 0.66	$ 1.99
Warrants Exercisable, Number Exercisable (in Shares)	342,840
Warrants Exercisable, Weighted Average Exercise Price	$ 0.59
Warrants at $1.275 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 1.275
Warrants Oustanding, Number Outstanding (in Shares)	1,961
Warrants Oustanding, Weighted Average Remaining Contractual Life	29 days
Warrants Outstanding, Weighted Average Exercise Price	$ 1.275
Warrants Exercisable, Number Exercisable (in Shares)	1,961
Warrants Exercisable, Weighted Average Exercise Price	$ 1.275
Warrants at $0.8475 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 0.8475
Warrants Oustanding, Number Outstanding (in Shares)	69,199
Warrants Oustanding, Weighted Average Remaining Contractual Life	146 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.8475
Warrants Exercisable, Number Exercisable (in Shares)	69,199
Warrants Exercisable, Weighted Average Exercise Price	$ 0.8475
Warrants at $0.80 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 0.80
Warrants Oustanding, Number Outstanding (in Shares)	20,000
Warrants Oustanding, Weighted Average Remaining Contractual Life	1 year 244 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.80
Warrants Exercisable, Number Exercisable (in Shares)	20,000
Warrants Exercisable, Weighted Average Exercise Price	$ 0.80
Warrants at $0.75 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 0.75
Warrants Oustanding, Number Outstanding (in Shares)	21,680
Warrants Oustanding, Weighted Average Remaining Contractual Life	120 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.75
Warrants Exercisable, Number Exercisable (in Shares)	21,680
Warrants Exercisable, Weighted Average Exercise Price	$ 0.75
Warrants at $0.65 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 0.65
Warrants Oustanding, Number Outstanding (in Shares)	40,000
Warrants Oustanding, Weighted Average Remaining Contractual Life	3 years 186 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.65
Warrants Exercisable, Number Exercisable (in Shares)	40,000
Warrants Exercisable, Weighted Average Exercise Price	$ 0.65
Warrants at $0.60 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 0.60
Warrants Oustanding, Number Outstanding (in Shares)	40,000
Warrants Oustanding, Weighted Average Remaining Contractual Life	1 year 54 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.60
Warrants Exercisable, Number Exercisable (in Shares)	40,000
Warrants Exercisable, Weighted Average Exercise Price	$ 0.60
Warrants at $0.40 [Member]
NOTE J - STOCK OPTIONS AND WARRANTS (Details) - Schedule of Warrants or Rights, Shares Authorized, by Exercise Price Range [Line Items]
Warrants Oustanding, Exercise Prices	$ 0.40
Warrants Oustanding, Number Outstanding (in Shares)	150,000
Warrants Oustanding, Weighted Average Remaining Contractual Life	1 year 178 days
Warrants Outstanding, Weighted Average Exercise Price	$ 0.40
Warrants Exercisable, Number Exercisable (in Shares)	150,000
Warrants Exercisable, Weighted Average Exercise Price	$ 0.40