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Note 12 - Retirement Fund and Profit Sharing Plan (Tables)
3 Months Ended
Mar. 31, 2022
Notes Tables  
Schedule of Net Benefit Costs [Table Text Block]
  

Three Months Ended

 
  

March 31,

 
  

2022

  

2021

 

Service cost

 $126  $169 

Interest cost

  159   135 

Net amortization

  78   127 

Net periodic benefit cost

 $363  $431 
Schedule of Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block]
  

March 31,

  

December 31,

 
  

2022

  

2021

 

Prior service cost

 $428  $460 

Net loss

  1,345   1,391 
  $1,773  $1,851