NOTE C - EARNINGS PER SHARE (Details) - Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share - shares		3 Months Ended		6 Months Ended
		Oct. 31, 2017	Oct. 31, 2016	Oct. 31, 2017	Oct. 31, 2016
Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Abstract]
Outstanding options and SARS excluded	[1]

[1] For the six and three month periods ended October 31, 2017, dilutive securities are excluded since the inclusion of such shares would be antidilutive due to the net loss for the periods. The exercisable shares excluded are 1,353,750. The effect of dilutive securities for the periods would have been 129,245 and 117,209, respectively. For the six and three month periods ended October 31, 2016, dilutive securities are excluded since the inclusion of such shares would be antidilutive due to the net loss for the periods. The exercisable shares excluded are 1,265,375. The effect of dilutive securities for the periods would have been 184,793 and 190,418, respectively.