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Fair Value Measurement (Tables) | 6 Months Ended
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Oct. 26, 2013
Fair Value Disclosures [Abstract] |
Schedule of Fair Value | The following table sets forth by Level within the fair value hierarchy our financial assets and liabilities that were accounted for at fair value on a recurring basis at October 26, 2013 and April 27, 2013 according to the valuation techniques we used to determine their fair values. There have been no transfers of assets or liabilities among the fair value hierarchies presented.
| Fair Value Measurements
| Level 1 |  | Level 2 |  | Total
Balance as of October 26, 2013: |  |  |  |  |
Cash and cash equivalents | $ | 52,236 |  |  | $ | — |  |  | $ | 52,236 |
Restricted cash | 29 |  |  | — |  |  | 29 |
Available-for-sale securities: |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 5,667 |  |  | 5,667 |
U.S. Government securities | 5,005 |  |  | — |  |  | 5,005 |
U.S. Government sponsored entities | — |  |  | 5,051 |  |  | 5,051 |
Municipal obligations | — |  |  | 9,644 |  |  | 9,644 |
Derivatives - currency forward contracts | — |  |  | (243 | ) |  | (243 | )
| $ | 57,270 |  |  | $ | 20,119 |  |  | $ | 77,389 |
Balance as of April 27, 2013: |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 40,628 |  |  | $ | — |  |  | $ | 40,628 |
Restricted cash | 48 |  |  | — |  |  | 48 |
Available-for-sale securities: |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 4,677 |  |  | 4,677 |
U.S. Government securities | 5,018 |  |  | — |  |  | 5,018 |
U.S. Government sponsored entities | — |  |  | 4,752 |  |  | 4,752 |
Municipal obligations | — |  |  | 9,605 |  |  | 9,605 |
Derivatives - currency forward contracts | — |  |  | 7 |  |  | 7 |
| $ | 45,694 |  |  | $ | 19,041 |  |  | $ | 64,735 |

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- Definition Tabular disclosure of assets and liabilities, including [financial] instruments measured at fair value that are classified in stockholders' equity, if any, that are measured at fair value on a recurring basis. The disclosures contemplated herein include the fair value measurements at the reporting date by the level within the fair value hierarchy in which the fair value measurements in their entirety fall, segregating fair value measurements using quoted prices in active markets for identical assets (Level 1), significant other observable inputs (Level 2), and significant unobservable inputs (Level 3). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19190-110258 + Details
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