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Note 7 - Supplemental Disclosures of Cash Flow Information (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Schedule of Cash Flow, Supplemental Disclosures [Table Text Block]
    Three Months Ended
  March 31,
    2020   2019
      (
In thousands
)
 
Cash payments for:                
Interest   $
459
    $
428
 
Taxes (net of refunds received)    
0
     
0