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Note 9 - Income Taxes (Details) - Unrecognized Tax Benefits (USD $) | 12 Months Ended |
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Dec. 31, 2013 | Dec. 31, 2014
Unrecognized Tax Benefits (Incomplete) [Abstract] |  |
Balance, beginning of year | $ 382,000 us-gaap_UnrecognizedTaxBenefits | $ 117,000 us-gaap_UnrecognizedTaxBenefits
Decrease in uncertain tax benefits of prior years | (265,000)us-gaap_UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions |
Balance, end of year | $ 117,000 us-gaap_UnrecognizedTaxBenefits | $ 117,000 us-gaap_UnrecognizedTaxBenefits

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- Details
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- Definition 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 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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- Definition Amount of decrease in unrecognized tax benefits resulting from tax positions taken in prior period tax returns. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=6907707&loc=SL6600010-109319 + Details
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