XML 53 R41.htm IDEA: XBRL DOCUMENT v3.20.1
Note 18 - Fair Value of Financial Instruments (Tables)
12 Months Ended
Dec. 31, 2019
Notes Tables  
Fair Value, Assets Measured on Recurring Basis [Table Text Block]
   
2019
   
2018
 
                                                                 
   
Total
   
Level 1
   
Level 2
   
Level 3
   
Total
   
Level 1
   
Level 2
   
Level 3
 
Marketable equity securities
  $
29,521
    $
29,521
     
-
     
-
    $
27,549
    $
27,549
     
-
     
-
 
Fair Value, by Balance Sheet Grouping [Table Text Block]
   
201
9
   
201
8
 
   
Carrying
Value
   
Estimated
Fair Value
   
Carrying
Value
   
Estimated
Fair Value
 
   
(in thousands)
 
Long-term debt
  $
224,777
    $
228,449
    $
211,031
    $
210,234