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Note 6 - Shareholders' Equity (Tables)
12 Months Ended
Mar. 01, 2020
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
March 1, 2020
   
March 3, 2019
 
                 
Unrealized gains (losses) on investments, net of taxes of $690 and $1,157, respectively
  $
668
    $
(22
)
Accumulated balance
 
$
668
   
$
(22
)