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Note 12 - Indebtedness (Tables)
6 Months Ended
Jun. 30, 2018
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
    June 30, 2018
Revolving credit facility   $
21,000
 
Term loan    
18,571
 
Total long-term debt    
39,571
 
Current portion    
(2,857
)
Long-term debt, excluding current portion   $
36,714