SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details Textual) (USD $)	9 Months Ended	3 Months Ended
Jan. 31, 2015	Jan. 31, 2015	Apr. 30, 2014
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contract Receivable Retainage	$ 1,143,000us-gaap_ContractReceivableRetainage	1,143,000us-gaap_ContractReceivableRetainage	$ 635,000us-gaap_ContractReceivableRetainage
Security Deposit	224,000us-gaap_SecurityDeposit	224,000us-gaap_SecurityDeposit	1,167,000us-gaap_SecurityDeposit
Accounts Receivable, Net	10,756,000us-gaap_AccountsReceivableNet	10,756,000us-gaap_AccountsReceivableNet
Contract Receivable Retainage, Description	there was one customer of the Suisun City Operations who comprised 23% of the Companys total accounts receivable.
Fair Value Assumptions, Risk Free Interest Rate	0.97%
Fair Value Assumptions, Expected Volatility Rate	180.20%
Fair Value Assumptions, Expected Dividend Payments	$ 0
Fair Value Assumptions, Expected Term	3 years
Share Price	$ 0.28us-gaap_SharePrice	0.28us-gaap_SharePrice
Convertible Series F and F-1 Preferred Stock [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Share Price	$ 301.81	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	350.43
CHINA
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Accounts Receivable, Net	5,117,000	5,117,000
Accounts Receivable, Net, Noncurrent	$ 1,519,000	1,519,000
Customer Concentration Risk [Member] \| Sales Revenue, Net [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Concentration Risk, Percentage	58.00%	57.00%

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Article 5

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-Name Accounting Standards Codification

-Topic 942

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-Section S99

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Amount due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount billed to customers under long-term contracts or programs that have been withheld because of retainage provisions in a contract.

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Explanation of the nature and status of amounts included within receivable balances billed but not paid by customers under retainage provisions in contracts.

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Amount of dividends expected to be paid to holders of the underlying shares or contracted instruments over the term of the instruments life.

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Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Risk-free interest rate assumption used in valuing an instrument.

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The amount of an asset, typically cash, provided to a counterparty to provide certain assurance of performance by the entity pursuant to the terms of a written or oral agreement, such as a lease.

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