XML 45 R36.htm IDEA: XBRL DOCUMENT v3.21.4
Investment Securities (Schedule of Investment Securities) (Details) - USD ($)
$ in Thousands
Nov. 27, 2021
May 29, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Current $ 69,596 $ 111,505
Unrealized Gains, Current 114 664
Unrealized Losses, Current 38 11
Estimated Fair Value, Current 69,672 112,158
Amortized Cost, Noncurrent 2,105 2,306
Unrealized Gains, Noncurrent 1,951 1,810
Unrealized Losses, Noncurrent 0 0
Estimated Fair Value, Noncurrent 4,056 4,116
Municipal Bonds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Current 917 16,424
Unrealized Gains, Current 4 56
Unrealized Losses, Current 0 0
Estimated Fair Value, Current 921 16,480
Commercial Paper [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Current 5,983 1,998
Unrealized Gains, Current 0 0
Unrealized Losses, Current 2 0
Estimated Fair Value, Current 5,981 1,998
Corporate Bonds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Current 54,457 80,092
Unrealized Gains, Current 110 608
Unrealized Losses, Current 0 0
Estimated Fair Value, Current 54,567 80,700
Certificates of Deposits [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Current   1,077
Unrealized Gains, Current   0
Unrealized Losses, Current   1
Estimated Fair Value, Current   1,076
Asset Backed Securities [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Current 8,239 11,914
Unrealized Gains, Current 0 0
Unrealized Losses, Current 36 10
Estimated Fair Value, Current 8,203 11,904
Mutual Funds [Member]    
Debt Securities, Available-for-sale [Line Items]    
Amortized Cost, Noncurrent 2,105 2,306
Unrealized Gains, Noncurrent 1,951 1,810
Unrealized Losses, Noncurrent 0 0
Estimated Fair Value, Noncurrent $ 4,056 $ 4,116