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Income Taxes	9 Months Ended
	Jan. 25, 2020
Income Taxes
Income Taxes	14. Income Taxes ​ For the three and nine months ended January 25, 2020, the Company recorded a (benefit from) provision for income taxes of $(38,000) and $3,203,000, respectively, yielding an effective tax rate of (28.4)% and 10.6%, respectively. For the three and nine months ended January 26, 2019, the Company recorded a provision for income taxes of $946,000 and $4,724,000, respectively, yielding effective tax rates of 9.4% and 11.1%, respectively. The variance from statutory rates for the three and nine months ended January 25, 2020 was primarily due to federal R&D credits, foreign derived intangible income deductions and the recording of discrete excess tax benefits resulting from the vesting of restricted stock awards and exercises of stock options. The variance from statutory rates for the three and nine months ended January 26, 2019 was primarily due to federal R&D credits and the recording of discrete excess tax benefits resulting from the vesting of restricted stock awards and exercises of stock options.

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- Definition

The entire disclosure for income taxes. Disclosures may include net deferred tax liability or asset recognized in an enterprise's statement of financial position, net change during the year in the total valuation allowance, approximate tax effect of each type of temporary difference and carryforward that gives rise to a significant portion of deferred tax liabilities and deferred tax assets, utilization of a tax carryback, and tax uncertainties information.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-URI http://asc.fasb.org/topic&trid=2144680

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