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Note 6 - Shareholders' Equity (Tables)
12 Months Ended
Feb. 26, 2023
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   

February 26, 2023

   

February 27, 2022

 
                 
                 

Unrealized losses on investments, net of taxes of $2,279 and $1,629, respectively

  $ (4,244 )   $ (1,965 )

Accumulated balance

  $ (4,244 )   $ (1,965 )