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Marketable Securities (Tables)
 12 Months Ended
Apr. 26, 2014
Marketable Securities [Abstract]  
Available-for-sale Securities
As of April 26, 2014 and April 27, 2013, our available-for-sale securities consisted of the following:
 
Amortized Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
Balance as of April 26, 2014:
 
 
 
 
 
 
 
Certificates of deposit
$
7,734

 
$
—

 
$
—

 
$
7,734

U.S. Government securities
2,000

 
2

 
—

 
2,002

U.S. Government sponsored entities
8,349

 
—

 
(8
)
 
8,341

Municipal obligations
7,309

 
12

 
—

 
7,321

 
$
25,392

 
$
14

 
$
(8
)
 
$
25,398

Balance as of April 27, 2013:
 

 
 

 
 

 
 

Certificates of deposit
$
4,677

 
$
—

 
$
—

 
$
4,677

U.S. Government securities
4,999

 
19

 
—

 
5,018

U.S. Government sponsored entities
4,752

 
—

 
—

 
4,752

Municipal obligations
9,596

 
9

 
—

 
9,605

 
$
24,024

 
$
28

 
$
—

 
$
24,052
Investments Classified by Contractual Maturity Date
All available-for-sale securities are classified as current assets, as they are readily available to support our current operating needs. The contractual maturities of available-for-sale debt securities as of April 26, 2014 were as follows:
 
Less than 12 months
 
1-5 Years
 
Total
Certificates of deposit
$
4,198

 
$
3,536

 
$
7,734

U.S. Government securities
1,001

 
1,001

 
2,002

U.S. Government sponsored entities
—

 
8,341

 
8,341

Municipal obligations
2,357

 
4,964

 
7,321

 
$
7,556

 
$
17,842

 
$
25,398