| 3. SIGNIFICANT ACCOUNTING POLICIES (Details Narrative) | 6 Months Ended | 
|---|---|
| Oct. 31, 2015  USD ($) | |
| Property, Plant and Equipment [Line Items] | |
| Asset impairment | $ 0 | 
| Uninsured cash amount | $ 2,062,000 | 
| SG Austria [Member] | |
| Property, Plant and Equipment [Line Items] | |
| Equity investment percentage | 14.50% | 
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- Definition Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition The amount of cash as of the balance sheet date that is not insured by the Federal Deposit Insurance Corporation. No definition available. 
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- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available. 
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- Details 
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