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Note 6 - Shareholders' Equity (Tables)
12 Months Ended
Mar. 03, 2019
Notes Tables  
Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]
   
March 3, 2019
   
February 25, 2018
 
                 
Currency translation adjustment
  $
-
    $
1,310
 
Unrealized gains (losses) on investments, net of taxes of $1,157 and $(635), respectively
   
(22
)    
(1,179
)
Accumulated balance
 
$
(22
)
 
$
131