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Note 12 - Income Taxes (Tables)
3 Months Ended
Mar. 31, 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

    11  

Increase to current year tax positions

    —  

Expiration of the statute of limitations for the assessment of taxes

    —  

Decrease related to settlements

    —  

Balance at March 31, 2015

  $ 1,604