Note 15 - Goodwill and Other Intangible Assets (Details) - Other Intangible Assets (USD $) In Thousands, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Gross	$ 2,700	$ 2,700
Intangible Assets, Accumulated Amortization	(2,140)	(1,568)
Intangible Assets, Net	560us-gaap_FiniteLivedIntangibleAssetsNet	1,132us-gaap_FiniteLivedIntangibleAssetsNet
Patents [Member]
Finite-Lived Intangible Assets [Line Items]
Intangible Assets, Useful Life	57 months	57 months
Intangible Assets, Gross	2,700	2,700
Intangible Assets, Accumulated Amortization	(2,140)	(1,568)
Intangible Assets, Net	$ 560	$ 1,132

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

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- Definition

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

+ References

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- Definition

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

+ References

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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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