| 1. BACKGROUND,ACQUISITION AND LIQUIDITY Narrative (Details) (USD $) | 6 Months Ended | ||
|---|---|---|---|
| Oct. 31, 2013 | Oct. 31, 2012 | Apr. 30, 2013 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |||
| Licenses | $ 2,549,427 | $ 0 | |
| Proceeds from sale of restricted stock | 1,500,000 | ||
| Payments made for acquisition of license | $ 1,572,195 | $ 1,520,980 | |
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- Definition Proceeds from sale of restricted stock No definition available. 
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| X | ||||||||||
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- Definition Carrying amount (original costs adjusted for previously recognized amortization and impairment) as of the balance sheet date for the capitalized costs to acquire rights under a license arrangement (for example, to sell specified products in a specified territory) having an indefinite period of benefit. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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| X | ||||||||||
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- Details 
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| X | ||||||||||
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- Definition The cash outflow associated with the purchase of all investments (debt, security, other) during the period. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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