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Fair Value Measurement (Tables) | 6 Months Ended
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Oct. 28, 2017
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 28, 2017 and April 29, 2017 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 |  | Level 3 |  | Total
Balance as of October 28, 2017 |  |  |  |  |  |  |
Cash and cash equivalents | $ | 39,699 |  |  | $ | — |  |  | $ | — |  |  | $ | 39,699 |
Restricted cash | 27 |  |  | — |  |  | — |  |  | 27 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 9,419 |  |  | — |  |  | 9,419 |
U.S. Government sponsored entities | — |  |  | 6,631 |  |  | — |  |  | 6,631 |
Municipal bonds | — |  |  | 5,737 |  |  | — |  |  | 5,737 |
Derivatives - asset position | — |  |  | 76 |  |  | — |  |  | 76 |
Derivatives - liability position | — |  |  | (269 | ) |  | — |  |  | (269 | )
Contingent liability | — |  |  | — |  |  | (986 | ) |  | (986 | )
| $ | 39,726 |  |  | $ | 21,594 |  |  | $ | (986 | ) |  | $ | 60,334 |
Balance as of April 29, 2017 |  |  |  |  |  |  |  |  |  |
Cash and cash equivalents | $ | 32,623 |  |  | $ | — |  |  | $ | — |  |  | $ | 32,623 |
Restricted cash | 216 |  |  | — |  |  | — |  |  | 216 |
Available-for-sale securities: |  |  |  |  |  |  |  |  |
Certificates of deposit | — |  |  | 12,487 |  |  | — |  |  | 12,487 |
U.S. Government securities | 400 |  |  | — |  |  | — |  |  | 400 |
U.S. Government sponsored entities | — |  |  | 12,238 |  |  | — |  |  | 12,238 |
Municipal bonds | — |  |  | 7,588 |  |  | — |  |  | 7,588 |
Derivatives - asset position | — |  |  | 64 |  |  | — |  |  | 64 |
Derivatives - liability position | — |  |  | (277 | ) |  | — |  |  | (277 | )
Contingent liability | — |  |  | — |  |  | (1,891 | ) |  | (1,891 | )
| $ | 33,239 |  |  | $ | 32,100 |  |  | $ | (1,891 | ) |  | $ | 63,448 |
Rollforward of Level 3 Contingent Consideration Liabilities | A roll forward of the Level 3 contingent liability, both short- and long-term, for the six months ended October 28, 2017 is as follows:
Contingent liability as of April 29, 2017 |  | $ | 1,891 |
Settlements |  | (1,009 | )
Interest |  | 20 |
Foreign currency translation |  | 84 |
Contingent liability as of October 28, 2017 |  | $ | 986 |

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- Definition Tabular disclosure of the fair value measurement of liabilities using significant unobservable inputs (Level 3), a reconciliation of the beginning and ending balances, separately presenting changes attributable to the following: (1) total gains or losses for the period (realized and unrealized), segregating those gains or losses included in earnings (or changes in net assets), and gains or losses recognized in other comprehensive income (loss) and a description of where those gains or losses included in earnings (or changes in net assets) are reported in the statement of income (or activities); (2) purchases, sales, issues, and settlements (each type disclosed separately); and (3) transfers in and transfers out of Level 3 (for example, transfers due to changes in the observability of significant inputs) by class of liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19279-110258 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258 + Details
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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=66048111&loc=d3e19190-110258 + Details
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