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Marketable Debt Securities (Tables)
 6 Months Ended
Feb. 15, 2020
Investments, Debt and Equity Securities [Abstract]  
Available-for-Sale Marketable Securities The Company’s available-for-sale marketable debt securities consisted of the following:
 
February 15, 2020
 
(in thousands)
  
    Amortized    
Cost
Basis
 
  
Gross
    Unrealized    
Gains
 
  
Gross
    Unrealized    
Losses
 
  
      Fair Value      
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
  $
33,784
    $
62
    $
–
     $
33,846
 
Government bonds
   
57,554
     
662
     
–
      
58,216
 
Mortgage-backed securities
   
3,414
     
12
     
(8
 )    
3,418
 
Asset-backed securities and other
   
28,956
     
13
     
(2
 )    
28,967
 
                                 
   $
123,708
    $
749
    $
 (10
 )   $
124,447
 
                                 
       
 
August 31, 2019
 
(in thousands)
 
Amortized
Cost
Basis
 
 
Gross
Unrealized
Gains
 
 
Gross
Unrealized
Losses
 
 
Fair Value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
  $
36,998
    $
29
    $
(19
 )   $
37,008
 
Government bonds
   
45,741
     
763
     
–
      
46,504
 
Mortgage-backed securities
   
2,089
     
2
     
(15
 )    
2,076
 
Asset-backed securities and other
   
53,345
     
–
      
(7
 )    
53,338
 
                                 
   $
138,173
    $
794
    $
(41
 )   $
138,926