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Note 4 - Fair Value Measurements (Tables)
6 Months Ended
Sep. 30, 2022
Notes Tables  
Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]
   

September 30, 2022

   

March 31, 2022

 
   

Carrying Value

   

Fair Value (Level 2)

   

Carrying Value

   

Fair Value (Level 2)

 

Notes

  $ 169,816     $ 143,930     $ 169,365     $ 185,438