CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	Apr. 30, 2012	Apr. 30, 2011
Statement of Cash Flows [Abstract]
Consolidated net loss	$ (20,569,671)	$ (37,005,912)
Depreciation and amortization	2,326,018	2,754,961
Loss from disposition of operations	1,032,737
Stock-based compensation	43,917	86,971
Provision for doubtful accounts	840,062	1,603,696
Amortization of debt issuance costs	436,737	204,261
Goodwill and intangible assets impairment	168,604	34,370,285
Change in the fair value of acquisition-related contingent consideration	83,628	217,571
Loss (gain) on sale of fixed assets	108,517	(78,694)
Deferred income taxes	4,204,824	(6,699,305)
Accounts receivable	(2,097,864)	2,584,156
Costs and estimated earnings in excess of billings on uncompleted contracts	2,287,393	4,210,816
Inventory	414,713	474,143
Prepaid expenses and other current assets	(687,518)	(699,490)
Income taxes receivable	1,357,039	(1,274,807)
Prepaid taxes	(5,769)	(173,700)
Other assets	(27,992)	29,617
Accounts payable and accrued expenses	7,355,969	(941,272)
Billings in excess of costs and estimated earnings on uncompleted contracts	1,587,550	173,638
Deferred revenue	(53,187)	274,646
NET CASH PROVIDED BY OPERATING ACTIVITIES	(1,194,293)	111,581
Acquisition of property and equipment, net	(405,632)	(1,193,647)
Acquisition of businesses, net of cash received	(1,043,006)	(1,022,003)
Proceeds from sale of operations, net of transaction costs	1,701,062
NET CASH PROVIDED BY (USED IN) INVESTING ACTIVITIES	252,424	(2,215,650)
FINANCING ACTIVITIES:
Debt issuance costs	(704,319)
Borrowings under lines of credit	4,964,140	1,373,944
Repayments under lines of credit	(7,000,000)
Repayments under loans payable, net	(47,074)	(66,812)
Repayments to joint venture partner, net	(209,562)	(42,923)
Repayments of capital lease obligations	(54,496)	(81,950)
NET CASH (USED IN) PROVIDED BY FINANCING ACTIVITIES	(3,051,311)	1,182,259
Effect of exchange rate changes on cash	(74,643)	216,607
NET DECREASE IN CASH AND CASH EQUIVALENTS	(4,067,823)	(705,203)
CASH AND CASH EQUIVALENTS, BEGINNING OF THE PERIOD	4,879,106	5,584,309
CASH AND CASH EQUIVALENTS, END OF THE PERIOD	811,283	4,879,106
Interest	428,450	451,681
Income taxes	61,383	173,700
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Issuance of notes for property and equipment	$ 470,906	$ 0