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Marketable Securities | 12 Months Ended
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Apr. 28, 2012
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 ASU 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 other comprehensive income (loss). Unrealized losses considered to be “other-than-temporary” are recognized currently in earnings. For fiscal 2012 and 2011, no gains or losses on available-for-sale securities were recognized in earnings. 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 that are traded in the market to estimate fair value. As of April 28, 2012 and April 30, 2011, our available-for-sale securities consisted of the following:
| Amortized Cost |  | Unrealized Gain |  | Unrealized Loss |  | Fair Value
Balance as of April 28, 2012: |  |  |  |  |  |  |
Certificates of deposit | $ | 7,657 |  |  | $ | — |  |  | $ | — |  |  | $ | 7,657 |
U.S. Government securities | 7,507 |  |  | 49 |  |  | — |  |  | 7,556 |
U.S. Government sponsored entities | 4,503 |  |  | 2 |  |  | — |  |  | 4,505 |
Municipal bonds | 5,517 |  |  | 23 |  |  | — |  |  | 5,540 |
| $ | 25,184 |  |  | $ | 74 |  |  | $ | — |  |  | $ | 25,258 |
Balance as of April 30, 2011: |  |  |  |  |  |  |
Certificates of deposit | $ | 4,913 |  |  | $ | — |  |  | $ | — |  |  | $ | 4,913 |
U.S. Government securities | 1,998 |  |  | 1 |  |  | — |  |  | 1,999 |
U.S. Government sponsored entities | 13,598 |  |  | 19 |  |  | — |  |  | 13,617 |
Municipal bonds | 2,412 |  |  | 2 |  |  | — |  |  | 2,414 |
| $ | 22,921 |  |  | $ | 22 |  |  | $ | — |  |  | $ | 22,943 |
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 28, 2012 were as follows:
| Less than 12 months |  | Greater than 12 months |  | Total
Certificates of deposit | $ | 5,927 |  |  | $ | 1,730 |  |  | $ | 7,657 |
U.S. Government securities | 4,522 |  |  | 3,034 |  |  | 7,556 |
U.S. Government sponsored agencies | 500 |  |  | 4,005 |  |  | 4,505 |
Municipal obligations | 1,601 |  |  | 3,939 |  |  | 5,540 |
Total available for sale | $ | 12,550 |  |  | $ | 12,708 |  |  | $ | 25,258 |

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- Definition Tabular disclosure of investments in certain debt and equity securities (and certain other trading assets) which include all debt and equity securities (other than those equity securities accounted for under the equity or cost methods of accounting) with readily determinable fair values. Other trading assets include assets that are carried on the balance sheet at fair value and held for trading purposes. A debt security represents a creditor relationship with an enterprise that is in the form of a security. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities (and other trading assets). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27405-111563 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 30 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6379141&loc=d3e15032-111544 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Equity Security -URI http://asc.fasb.org/extlink&oid=6511694 -Topic 320 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Debt Security -URI http://asc.fasb.org/extlink&oid=6509901 -Topic 320 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 3, 19, 20, 21, 22, 137 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27232-111563 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27357-111563 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 320 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6957658&loc=d3e62557-112803 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27290-111563 + Details
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