SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) - Equity Component [Domain] - USD ($)	12 Months Ended
	Apr. 30, 2015	Apr. 30, 2014	Jun. 30, 2015	Apr. 30, 2013
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contract Receivable Retainage	$ 1,119,000	$ 635,000
Accounts Receivable, Net	$ 6,494,000
Contract Receivable Retainage, Description	there was one customer of the Suisun City Operations who comprised 61% of the Companys total accounts receivable.
Concentration Risk, Percentage	60.60%	16.60%
Fair Value Assumptions, Risk Free Interest Rate	0.97%
Fair Value Assumptions, Expected Volatility Rate	180.20%
Fair Value Assumptions, Expected Dividend Payments	$ 0
Cash and Cash Equivalents, at Carrying Value, Total	$ 2,364,360	$ 2,177,070	$ 2,364,000	$ 1,410,223
Deferred Tax Assets, Valuation Allowance	$ 12,000,000
Percentage Of Labor Force Subject To Collective Bargaining Agreements	76.00%
Convertible Series F and F-1 Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Share Price	$ 301.81
Convertible Series G and G-1 Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Share Price	$ 350.43
Foreign Financial Institutions [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Cash and Cash Equivalents, at Carrying Value, Total	$ 1,555,000