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Income Taxes (Tables) | 6 Months Ended
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Oct. 28, 2018
Income Tax Disclosure [Abstract] |
Summary of Differences in Income Tax Expense at Federal Income Tax Rate and Effective Income Tax Rate | The following schedule summarizes the factors that contribute to the difference between income tax expense at the federal income tax rate and the effective income tax rate reflected in the consolidated financial statements:
|  | 2019 |  |  | 2018 |
Federal income tax rate |  |  | 21.0 | % |  |  | 34.0 | %
Foreign income tax rate differential |  |  | 7.8 |  |  |  | 1.1 |
Tax effects of Chinese foreign exchange (losses) gains |  |  | 2.8 |  |  |  | (1.5 | )
Global Intangible Low Taxed Income Tax (GILTI) |  |  | 2.1 |  |  |  | — |
Change in estimate of valuation allowance |  |  | 1.2 |  |  |  | 0.7 |
Excess income tax deficiency (benefits) related to stock-based compensation |  |  | 0.5 |  |  |  | (4.3 | )
Other |  |  | (0.3 | ) |  |  | (0.9 | )
|  |  | 35.1 | % |  |  | 29.1 | %
Summary of Valuation Allowances Against Deferred Income Taxes | Based on our assessments at October 28, 2018, October 29, 2017, and April 29, 2018, valuation allowances against our deferred income taxes pertain to the following jurisdictions:
(dollars in thousands) |  | October 28, 2018 |  |  | October 29, 2017 |  |  | April 29, 2018 |
U.S. foreign income tax credits |  | $ | 4,550 |  |  |  | — |  |  |  | 4,550 |
U.S. state loss carryforwards and credits |  |  | 756 |  |  |  | 554 |  |  |  | 578 |
Polish loss carryforwards |  |  | — |  |  |  | 78 |  |  |  | 76 |
|  | $ | 5,306 |  |  |  | 632 |  |  |  | 5,204 |

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32687-109319 + Details
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- Definition Tabular disclosure of valuation allowances to reduce deferred tax assets to net realizable value, including identification of the deferred tax asset more likely than not will not be fully realized and the corresponding amount of the valuation allowance. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319 + Details
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