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Note 7 - Commitments and Contingencies (Tables)
6 Months Ended
Sep. 30, 2021
Notes Tables  
Disclosure of Share-based Compensation Arrangements by Share-based Payment Award [Table Text Block]

Absolute Stock Price Hurdle

  

Shares

  

Cumulative Shares

 
$40   85,000   85,000 
$45   107,000   192,000 
$50   106,000   298,000 
$55   106,000   404,000 
$60   106,000   510,000