v3.23.1
Investment Securities - Narrative (Details) - USD ($)
Nov. 26, 2022
Feb. 26, 2022
Feb. 27, 2021
Debt Securities, Available-for-sale [Line Items]      
Short-term available-for-sale investment securities $ 0 $ 0  
Auction Rate Securities      
Debt Securities, Available-for-sale [Line Items]      
Long term available-for-sale investment securities 20,300,000 20,300,000  
Valuation adjustments $ (1,100,000) (1,100,000) $ (800,000)
Long term available-for-sale investment securities   20,300,000 20,300,000
Short term held-to-maturity securities   $ 0 $ 0