Note 6 - Goodwill and Intangible Assets (Details) - Definite-Lived Intangible Assets (USD $)	12 Months Ended
Dec. 31, 2013	Dec. 31, 2012
Finite-Lived Intangible Assets [Line Items]
Patents and Trademarks	$ 92,000	$ 113,000
Patents and Trademarks [Member]
Finite-Lived Intangible Assets [Line Items]
Patents and Trademarks	6 years	6 years
Patents and Trademarks	474,000	473,000
Patents and Trademarks	(382,000)	(360,000)
Patents and Trademarks	$ 92,000	$ 113,000

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

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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- Definition

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

+ References

+ Details

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Namespace Prefix:	us-gaap_
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- 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.

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- Definition

Gross carrying amount before accumulated amortization as of the balance sheet date of the costs pertaining to the exclusive legal rights granted to the owner of the patent to exploit an invention or a process for a period of time specified by law. Such costs may have been expended to directly apply and receive patent rights, or to acquire such rights.

+ References

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