XML 30 R20.htm IDEA: XBRL DOCUMENT v3.8.0.1
Note 2 - Supplemental Cash Flow Information (Tables)
 9 Months Ended
Sep. 30, 2017
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
    Nine Months Ended
September 30
    2017   2016
    (in thousands)
Cash paid for:                
Interest   $
37
     $
51
  
Income taxes, net of refunds    
3,167
      
2,178
  
                 
Non-cash investing and financing activities:                
Capital additions accrued but not yet paid   $
527
     $
311