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Note 19 - Stockholders' Equity - Components of Accumulated Other Comprehensive Income (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Balance at January 1, 2015 $ 19,712  
Foreign currency translation adjustments (1,780) $ (2,289)
Balance at December 31, 2015 26,098 19,712
Accumulated Foreign Currency Adjustment Attributable to Parent [Member]    
Balance at January 1, 2015 (9,554) (7,265)
Foreign currency translation adjustments (1,780) (2,289)
Net actuarial gain for the year 0 0
Amortization for the year 0 0
Balance at December 31, 2015 (11,334) (9,554)
Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member]    
Balance at January 1, 2015 (16,206) (17,770)
Foreign currency translation adjustments 0 0
Net actuarial gain for the year 164 667
Amortization for the year 778 897
Balance at December 31, 2015 (15,264) (16,206)
AOCI Attributable to Parent [Member]    
Balance at January 1, 2015 (25,760) (25,035)
Foreign currency translation adjustments (1,780) (2,289)
Net actuarial gain for the year 164 667
Amortization for the year 778 897
Balance at December 31, 2015 $ (26,598) $ (25,760)