BASIC AND DILUTED NET (LOSS) INCOME COMMON SHARE (Details) - USD ($)	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Numerator:
Net (loss) income, basic and diluted	$ (440,078)	$ 557,181
Denominator:
Weighted average shares outstanding - basic	3,352,159	2,701,404
Stock options	0	160,524
Series H and H-1 convertible preferred stock	0	1,075,700
Weighted average shares outstanding - diluted	3,352,159	3,937,628
Basic (loss) income per common share	$ (0.13)	$ 0.21
Diluted (loss) income per common share	$ (0.13)	$ 0.14