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Note 6 - Intangible Assets (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014
Patents and Copyrights [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 17 years | 17 years
Finite-lived intangible assets, gross | $ 90,327 | $ 77,357
Finite-lived intangible assets, accumulated amortization | 36,659 | 33,153
Finite-lived intangible assets, net | $ 53,668 | $ 44,204
Intellectual Property [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 15 years | 15 years
Finite-lived intangible assets, gross | $ 100,000 | $ 100,000
Finite-lived intangible assets, accumulated amortization | 93,333 | 88,333
Finite-lived intangible assets, net | $ 6,667 | $ 11,667
Licensing Agreements [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 5 years | 5 years
Finite-lived intangible assets, gross | $ 10,000 | $ 10,000
Finite-lived intangible assets, accumulated amortization | 10,000 | 10,000
Finite-lived intangible assets, net | $ 0 | $ 0
Certifications [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 3 years | 3 years
Finite-lived intangible assets, gross | $ 58,722 | $ 58,722
Finite-lived intangible assets, accumulated amortization | 58,722 | 58,722
Finite-lived intangible assets, net | $ 0 | $ 0
Other Intangible Assets [Member] |  |
Finite-Lived Intangible Asset, Useful Life | 5 years | 5 years
Finite-lived intangible assets, gross | $ 21,492 | $ 21,492
Finite-lived intangible assets, accumulated amortization | 21,492 | 21,492
Finite-lived intangible assets, net | 0 | 0
Finite-lived intangible assets, gross | 280,451 | 267,571
Finite-lived intangible assets, accumulated amortization | 220,206 | 211,700
Finite-lived intangible assets, net | $ 60,335 | $ 55,871

X
- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- 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=26713463&loc=d3e16323-109275 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount before 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=26713463&loc=d3e16323-109275 + Details
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X
- 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=26713463&loc=d3e16323-109275 + Details
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Balance Type: | debit
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- Details
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- Details
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- Details
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- Details
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- Details
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