DISCONTINUED OPERATIONS (Details) (USD $)	3 Months Ended		9 Months Ended
	Jan. 31, 2013	Jan. 31, 2012	Jan. 31, 2013	Jan. 31, 2012
REVENUE	$ 0	$ 7,369,878	$ 4,901,501	$ 21,384,280
COSTS AND EXPENSES:
Cost of revenue	0	5,195,158	4,088,400	15,945,789
Selling, general and administrative expenses	0	1,686,762	1,291,164	5,235,987
Depreciation and amortization	0	124,822	101,750	424,330
Disposal Group, Including Discontinued Operation, Operating Expense	0	7,006,742	5,481,314	21,606,106
OPERATING INCOME (LOSS) FROM DISCONTINUED OPERATIONS	0	363,136	(579,813)	(221,826)
Interest expense	0	8,699	5,315	14,075
Income (loss) from discontinued operations before income tax (benefit) provision	0	354,437	(585,128)	(235,901)
Income tax (benefit) provision	(31,913)	1,954,051	110,518	1,837,728
Income (loss) from discontinued operations, net of tax	31,913	(1,599,614)	(695,646)	(2,073,629)
Gain (loss) from disposal	(12,880)	0	1,826,539	(1,027,637)
TOTAL INCOME (LOSS) FROM DISCONTINUED OPERATIONS	$ 19,033	$ (1,599,614)	$ 1,130,893	$ (3,101,266)