DISCONTINUED OPERATIONS (Details) - USD ($)	3 Months Ended		9 Months Ended
	Jan. 31, 2017	Jan. 31, 2016	Jan. 31, 2017	Jan. 31, 2016
Revenue		$ 0		$ 839,969
Costs and expenses:
Cost of revenue		0		546,296
Selling, general and administrative expenses		0		111,324
Depreciation and amortization		0		80,971
Disposal Group, Including Discontinued Operation, Operating Expense		0		738,591
Operating income from discontinued operations		0		101,378
Interest expense		0		(49,234)
Income from discontinued operations before income tax provision		0		52,144
Income tax provision		0		(10,883)
Income from discontinued operations, net of tax	$ 0	0	$ 0	41,261
Gain from disposal	$ 0	0	$ 0	837,720
Total income from discontinued operations		$ 0		$ 878,981