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Note G - Stock Based Compensation (Tables)
 6 Months Ended
Sep. 30, 2020
Notes Tables  
Nonvested Restricted Stock Shares Activity [Table Text Block]
     
 
 
  
Weighted Average
  
   
Number of Shares
    
Grant Date Fair Value Per Share
  
Unvested at March 31, 2020
    
270,000
     $
6.37
  
Cancelled or forfeited
    
—
      
—
  
Granted
    
11,000
      
4.53
  
Vested
    
—
      
—
  
Unvested at September 30, 2020
    
281,000
     $
6.30