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Note 2 - Supplemental Cash Flow Information
6 Months Ended
Jun. 30, 2017
Notes to Financial Statements  
Cash Flow, Supplemental Disclosures [Text Block]
(
2
)
Supplemental Cash Flow Information
 
    Six Months Ended
June 30,
    2017   2016
    (in thousands)
Cash paid for:                
Interest   $
26
    $
35
 
Income taxes, net of refunds    
1,434
     
728
 
                 
Non-cash investing and financing activities:                
Capital additions accrued but not yet paid   $
495
    $
284