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Note 7 - Changes in Shareholders' Equity (Tables)
3 Months Ended
Jun. 30, 2021
Notes Tables  
Schedule of Stockholders Equity [Table Text Block]
  

Additional

     
  

Paid-In

  

Retained

 
  

Capital

  

Earnings

 
         

Beginning balance at March 31, 2021:

 $7,111  $134,141 

Share based compensation

  718   - 

Dividends declared

  -   (6,080)

Net income

  -   4,428 
         

Ending balance at June 30, 2021:

 $7,829  $132,489 
  

Additional

     
  

Paid-In

  

Retained

 
  

Capital

  

Earnings

 
         

Beginning balance at March 31, 2020:

 $3,804  $126,177 

Share based compensation

  740   - 

Dividends declared

  -   (5,647)

Net income

  -   7,768 
         

Ending balance at June 30, 2020:

 $4,544  $128,298