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Note F - Stock Based Compensation (Tables)
6 Months Ended
Sep. 30, 2019
Notes Tables  
Nonvested Restricted Stock Shares Activity [Table Text Block]
   
Number of Shares
   
Weighted Average
Grant Date Fair
Value Per Share
 
Unvested at March 31, 2019
   
180,000
    $
7.03
 
Cancelled or forfeited
   
     
 
Granted
   
20,000
     
7.62
 
Vested
   
     
 
Unvested at September 30, 2019
   
200,000
    $
7.09