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Note 12 - Income Taxes (Tables)
6 Months Ended
Jun. 30, 2015
Income Tax Disclosure [Abstract]  
Summary of Income Tax Contingencies [Table Text Block]

Balance at January 1, 2015

  $ 1,593  

Increase to prior year tax positions

    87  

Increase to current year tax positions

     

Expiration of the statute of limitations for the assessment of taxes

    (281 )

Decrease related to settlements

     

Balance at June 30, 2015

  $ 1,399