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Note 12 - Fair Value of Financial Instruments (Tables)
3 Months Ended
Mar. 31, 2020
Notes Tables  
Fair Value, by Balance Sheet Grouping [Table Text Block]
   

March 31, 2020

   

December 31, 2019

 

(in thousands)

 

Carrying

Amount

   

Fair Value

   

Carrying

Amount

   

Fair Value

 

Cash and Cash Equivalents

  $ 7,884     $ 7,884     $ 21,199     $ 21,199  

Short-Term Debt

    (19,893 )     (19,893 )     (6,000 )     (6,000 )

Long-Term Debt including Current Maturities

    (724,624 )     (759,980 )     (689,764 )     (742,279 )