CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	3 Months Ended
	Jul. 31, 2017	Jul. 31, 2016
Operating activities:
Net (loss) income	$ (440,078)	$ 557,181
Adjustments to reconcile consolidated net loss to net cash provided by (used in) operating activities:
Depreciation and amortization	30,073	20,666
Shares based compensation	0	22,501
Changes in operating assets and liabilities:
Accounts receivable	197,426	(1,441,964)
Costs and estimated earnings in excess of billings on uncompleted contracts	75,870	(79,975)
Prepaid expenses and other current assets	(9,764)	(57,721)
Other assets	0	(3,778)
Accounts payable and accrued expenses	(421,159)	204,952
Billings in excess of costs and estimated earnings on uncompleted contracts	806,085	543,006
Net cash provided by (used in) operating activities	238,453	(235,132)
Investing activities:
Acquisition of property and equipment	(4,105)	(30,803)
Net cash used in investing activities	(4,105)	(30,803)
Financing activities:
Repayment under loan payable obligations	(13,043)	(29,762)
Net cash used in financing activities	(13,043)	(29,762)
Net change in cash, cash equivalents and restricted cash	221,305	(295,697)
Cash, cash equivalents and restricted cash beginning of the year	2,159,344	2,235,597
Cash, cash equivalents and restricted cash end of the year	2,380,649	1,939,900
Schedule of non-cash investing and financing activities:
Automobile financing	$ 0	$ 50,622