10. SEGMENT REPORTING (Details - Summary) - USD ($)	3 Months Ended	12 Months Ended
Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015	Jul. 31, 2015	Apr. 30, 2015	Jan. 31, 2015	Oct. 31, 2014	Jul. 31, 2014	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Segment Reporting [Abstract]
Contract manufacturing services revenue									$ 44,357,000	$ 26,744,000	$ 22,294,000
Cost of contract manufacturing services									22,966,000	15,593,000	13,110,000
Gross profit	$ 9,062,000	$ 2,776,000	$ 4,782,000	$ 4,771,000	$ 4,550,000	$ 2,564,000	$ 2,124,000	$ 1,913,000	21,391,000	11,151,000	9,184,000
Revenue from products in research and development									329,000	37,000	107,000
Research and development expense									(59,529,000)	(42,996,000)	(27,723,000)
Selling, general and administrative expense									(18,551,000)	(18,691,000)	(17,274,000)
Other income (expense), net									708,000	141,000	344,000
Net loss	$ (11,884,000)	$ (16,847,000)	$ (13,198,000)	$ (13,723,000)	$ (12,135,000)	$ (12,994,000)	$ (12,100,000)	$ (13,129,000)	$ (55,652,000)	$ (50,358,000)	$ (35,362,000)

Costs incurred in production of other products during the reporting period.

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Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity.

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Revenue earned during the period relating to consideration received from another party for the right to use, but not own, certain of the entity's intangible assets. Licensing arrangements include, but are not limited to, rights to use a patent, copyright, technology, manufacturing process, software or trademark. Licensing fees are generally, but not always, fixed as to amount and not dependent upon the revenue generated by the licensing party. An entity may receive licensing fees for licenses that also generate royalty payments to the entity.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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The net amount of other operating income and expenses, the components of which are not separately disclosed on the income statement, from items that are associated with the entity's normal revenue producing operations.

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No definition available.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Amount of revenue from the sale of manufactured products, classified as other.

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The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc.

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