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Note 12 - Indebtedness (Tables)
3 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
    March 31,
2018
 
Revolving credit facility   $
30,000
   
Term loan    
19,286
   
Total long-term debt    
49,286
   
Current portion    
(2,857
)  
Long-term debt, excluding current portion   $
46,429