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Note 3 - Supplemental Cash Flow Information
3 Months Ended
Mar. 31, 2018
Notes to Financial Statements  
Cash Flow, Supplemental Disclosures [Text Block]
(
3
)
Supplemental Cash Flow Information
 
    Three Months Ended
March 31,
 
    2018   2017  
    (in thousands)  
Cash paid for:                  
Interest   $
114
    $
14
   
Income taxes, net of refunds    
-
     
79
   
                   
Non-cash investing and financing activities:                  
Capital additions accrued but not yet paid   $
197
    $
392