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Marketable Securities
 3 Months Ended
Jul. 27, 2013
Marketable Securities [Abstract]  
Marketable Securities
 Marketable Securities

We have a cash management program which provides for the investment of cash balances not used in current operations.  We classify our investments in marketable securities as available-for-sale in accordance with the provisions of ASC 320, Investments – Debt and Equity Securities.  Marketable securities classified as available-for-sale are reported at fair value with unrealized gains or losses, net of tax, reported in accumulated other comprehensive (loss) income.  As it relates to fixed income marketable securities, we do not intend to sell any of these investments, and it is not more-likely-than-not we will be required to sell any of these investments before recovery of the entire amortized cost basis. In addition, as of July 27, 2013, we anticipate we will recover the entire amortized cost basis of such fixed income securities, and we have determined no other-than-temporary impairments associated with credit losses were required to be recognized. The cost of securities sold is based on the specific identification method. Where quoted market prices are not available, we use the market price of similar types of securities traded in the market to estimate fair value.  

As of July 27, 2013 and April 27, 2013, our available-for-sale securities consisted of the following:
 
Amortized Cost
 
Unrealized Gains
 
Unrealized Losses
 
Fair Value
Balance as of July 27, 2013:
 
 
 
 
 
 
 
Certificates of deposit
$
4,677

 
$
—

 
$
—

 
$
4,677

U.S. Government securities
5,000

 
10

 
—

 
5,010

U.S. Government sponsored entities
4,251

 
—

 
(2
)
 
4,249

Municipal obligations
10,706

 
—

 
(6
)
 
10,700

 
$
24,634

 
$
10

 
$
(8
)
 
$
24,636

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



Realized gains or losses on investments are recorded in our consolidated statements of operations as other (expense) income, net. Upon the sale of a security classified as available-for-sale, the security’s specific unrealized gain (loss) is reclassified out of "accumulated other comprehensive (loss) income” and into earnings based on the specific identification method. In the three months ended July 27, 2013 and July 28, 2012, the reclassifications from accumulated other comprehensive (loss) income to net assets were immaterial. Realized gains and losses on sales or maturities of investments were immaterial in the three months ended July 27, 2013 and July 28, 2012.

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 July 27, 2013 were as follows:
 
Less than 12 months
 
Greater than 12 months
 
Total
Certificates of deposit
$
1,718

 
$
2,959

 
$
4,677

U.S. Government securities
3,011

 
1,999

 
5,010

U.S. Government sponsored entities
—

 
4,249

 
4,249

Municipal obligations
4,141

 
6,559

 
10,700

 
$
8,870

 
$
15,766

 
$
24,636