| Note 5 - Goodwill and Other Intangible Assets (Details) - Summary of Expected Amortization Over the Next Five Years (USD $) In Thousands, unless otherwise specified | Dec. 31, 2014 | 
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| Summary of Expected Amortization Over the Next Five Years [Abstract] | |
| 2015 | $ 510us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear | 
| 2016 | 425us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseNextTwelveMonths | 
| 2017 | 391us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo | 
| 2018 | 361us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree | 
| 2019 | 280us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour | 
| $ 1,967us-gaap_FiniteLivedIntangibleAssetsNet | 
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- Details 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the next fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized in the remainder of the fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. No definition available. 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the fourth fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the third fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount of amortization expense for assets, excluding financial assets and goodwill, lacking physical substance with a finite life expected to be recognized during the second fiscal year following the latest fiscal year. Excludes interim and annual periods when interim periods are reported on a rolling approach, from latest balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/presentationRef 
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