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Note D - Marketable Equity Securities (Tables)
6 Months Ended
Jun. 30, 2021
Notes Tables  
Marketable Securities [Table Text Block]
  

June 30, 2021

  

December 31, 2020

 
  

(in thousands)

 

Fair market value

 $33,016  $27,941 

Cost

  25,961   25,860 

Unrealized gain

 $7,055  $2,081 
Unrealized Gain (Loss) on Investments [Table Text Block]
  

June 30, 2021

  

December 31, 2020

 
  

(in thousands)

 

Gross unrealized gains

 $10,312  $7,048 

Gross unrealized losses

  3,257   4,967 

Net unrealized gain

 $7,055  $2,081 
Schedule of Realized Gain (Loss) [Table Text Block]
  

Three Months Ended

  

Six Months Ended

 
  

June 30,

  

June 30,

 
  

2021

  

2020

  

2021

  

2020

 
  

(in thousands, except per share data)

 

Sales proceeds

 $760  $184  $1,421  $861 

Cost of securities sold

  418   255   540   1,466 

Realized gain (loss)

 $342  $(71) $881  $(605)