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Marketable Debt Securities (Tables)
 8 Months Ended
May 04, 2019
Investments, Debt and Equity Securities [Abstract]  
Available-for-Sale Marketable Securities The Company’s available-for-sale marketable debt securities consisted of the following:
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
May 4, 2019
  
(in thousands)
 
Amortized

Cost

Basis
 
Gross

Unrealized

Gains
 
Gross

Unrealized

Losses
 
Fair Value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
 
 
$
40,182
 
 
 
$
–
 
 
 
$
(301
)
 
 
$
39,881
 
Government bonds
 
 
 
42,345
 
 
 
 
180
 
 
 
 
(34
)
 
 
 
42,491
 
Mortgage-backed securities
 
 
 
2,466
 
 
 
 
–
 
 
 
 
(44
)
 
 
 
2,422
 
Asset-backed securities and other
 
 
 
28,586
 
 
 
 
–
 
 
 
 
(45
)
 
 
 
28,541
 
 
 
 
$
113,579
 
 
 
$
180
 
 
 
$
(424
)
 
 
$
113,335
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
August 25, 2018
  
(in thousands)
 
Amortized

Cost

Basis
 
Gross 
Unrealized

Gains
 
Gross

Unrealized

Losses
 
Fair Value
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
Corporate debt securities
 
 
$
50,306
 
 
 
$
–
 
 
 
$
(684
)
 
 
$
49,622
 
Government bonds
 
 
 
28,777
 
 
 
 
–
 
 
 
 
(173
)
 
 
 
28,604
 
Mortgage-backed securities
 
 
 
3,248
 
 
 
 
–
 
 
 
 
(90
)
 
 
 
3,158
 
Asset-backed securities and other
 
 
 
53,445
 
 
 
 
–
 
 
 
 
(153
)
 
 
 
53,292
 
 
 
 
$
135,776
 
 
 
$
–
 
 
 
$
(1,100
)
 
 
$
134,676