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Note 5 - Income Taxes (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013
Note 5 - Income Taxes (Details) [Line Items]
Unrecognized Tax Benefits	$ 562,000us-gaap_UnrecognizedTaxBenefits	$ 340,000us-gaap_UnrecognizedTaxBenefits
Unrecognized Tax Benefits, Increase Resulting from Current Period Tax Positions	222,000us-gaap_UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	386,000us-gaap_UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense	$ 72,000us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	$ 0us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense
Earliest Tax Year [Member] | Domestic Tax Authority [Member]
Note 5 - Income Taxes (Details) [Line Items]
Open Tax Year	2011

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Tax year that remains open to examination under enacted tax laws, in CCYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (e)

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Amount of unrecognized tax benefits pertaining to uncertain tax positions taken in tax returns.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Unrecognized Tax Benefit

-URI http://asc.fasb.org/extlink&oid=6527854



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Amount of expense for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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-Publisher FASB

-Name Accounting Standards Codification

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Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return.

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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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