Note 7 - Intangible Assets, Net: Schedule of Finite-Lived Intangible Assets (Details) - USD ($)	12 Months Ended
Mar. 31, 2016	Mar. 31, 2015
Intangible assets, net	$ 12,295,147	$ 15,393,272
Use Rights
Amortization Period	50 years
Intangible Assets, Gross (Excluding Goodwill)	$ 1,570,605	1,652,177
Patents (non-US No. ZL200610068850.0)
Amortization Period	16 years 6 months
Intangible Assets, Gross (Excluding Goodwill)	$ 7,119,421	7,489,173
Patents (non-US No. ZL200510045001.9)
Amortization Period	14 years
Intangible Assets, Gross (Excluding Goodwill)	$ 9,595,741	10,094,103
Patents (non-US No. ZL200710013301.8)
Amortization Period	15 years
Intangible Assets, Gross (Excluding Goodwill)		1,628,082
Patents
Finite-Lived Intangible Assets, Accumulated Amortization	$ (5,990,620)	(5,470,263)
Intangible assets, net	$ 12,295,147	$ 15,393,272

Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before accumulated amortization of intangible assets, excluding goodwill.

+ References

No definition available.

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- Definition

Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph ((a)(1),(b))
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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