Significant Accounting Policies (Policies)	6 Months Ended
Oct. 29, 2017
Accounting Policies [Abstract]
Recently Adopted and Issued Accounting Pronouncements	Recently Adopted Accounting Pronouncements Measurement of Inventory In July 2015, the FASB issued ASU No. 2015-11, “Simplifying the Measurement of Inventory”, which changed the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. ASU No. 2015-11 was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2016. As a result, we adopted ASU No. 2015-11 in the first quarter of fiscal 2018 and the adoption of this guidance did not have a significant impact on our consolidated financial statements. Stock-Based Compensation In March 2016, the FASB issued ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting". ASU No. 2016-09 was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2016. Accordingly, we adopted this guidance during the first quarter of fiscal 2018. ASU No. 2016-09 aims to simplify several aspects of accounting and financial reporting for share-based payment transactions. One provision within this pronouncement requires that excess income tax benefits and deficiencies related to share-based payments be recognized within income tax expense as a discrete event in the period in which they occur, rather than within additional paid-in capital on our consolidated balance sheet on a prospective basis. The impact to our results of operations related to this provision through the second quarter of fiscal 2018 was a reduction to income tax expense of $556,000. The impact of this provision on our future results of operations will depend in part on the market prices for the shares of our common stock on the dates there are taxable events related to the share-based awards, and therefore, the impact is difficult to predict. In connection with another provision within ASU No. 2016-09, we have elected to account for forfeitures of share-based awards as an estimate of the number of awards that are expected to vest, which is consistent with our accounting policy prior to adoption. Also, we adopted the provisions of ASU No. 2016-09 related to changes on the Consolidated Statements of Cash Flows on a retrospective basis. As a result, we no longer classify excess income tax benefits as a financing activity, which increased net cash provided by operating activities and reduced net cash provided by financing activities by $167,000 for the six months ended October 30, 2016. Additionally, we no longer classify payments for employee taxes when common stock shares are withheld to satisfy the employer’s statutory income tax withholding obligation as an operating activity, which increased net cash provided by operating activities and reduced net cash provided by financing activities by $280,000 for the six months ended October 30, 2016. Recently Issued Accounting Pronouncements In May 2014, the FASB issued ASU No. 2014-09, which amends ASC Topic 606, Revenue from Contracts with Customers. The amendments in this ASU are intended to enhance the comparability of revenue recognition practices and will be applied to all contracts with customers. Improved disclosures related to the nature, amount, timing, and uncertainty of revenue that is recognized are requirements under the amended guidance. In April 2015, the FASB issued ASU 2015-24, Revenue from Contracts with Customers: Deferral of the Effective Date which proposed a deferral of the effective date by one year, and on July 7, 2015, the FASB decided to delay the effective date by one year. The deferral results in the new revenue standard being effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. We are therefore required to apply the new revenue guidance in our fiscal 2019 interim and annual financial statements. This ASU can be adopted either retrospectively or as a cumulative-effect adjustment as of the date of adoption. We are currently assessing the impact that this guidance will have on our consolidated financial statements but we expect this guidance to have a material impact on our disclosures in our notes to the consolidated financial statements. In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which increases transparency and comparability among companies accounting for lease transactions. The most significant change of this update will require the recognition of lease assets and liabilities on the balance sheet for operating lease arrangements with lease terms greater than twelve months for lessees. This update will require a modified retrospective application which includes a number of optional practical expedients related to the identification and classification of leases commenced before the effective date. This ASU is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018. We are therefore required to apply this guidance in our fiscal 2020 interim and annual financial statements. We are currently assessing the impact that this guidance will have on our consolidated financial statements but we expect this guidance to have a material impact on our financial position as a result of the requirement to recognize right-of-use assets and lease liabilities on our consolidated balance sheets. In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address the diversity in how certain cash receipts and cash payments are presented in the statement of cash flows. This new guidance provides clarity around the cash flow classification for eight specific issues in an effort to reduce the current and potential future diversity in practice. This standard, which is to be applied retrospectively, will be effective for the first interim period within annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We are therefore required to apply this new guidance in our fiscal 2019 interim and annual financial statements. We are currently assessing the impact that this guidance will have on our consolidated financial statements. In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory, to reduce the diversity in practice and complexity associated with accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits recognition of deferred income taxes for an intra-entity transfer until the asset has been sold to an outside party. The new pronouncement stipulates that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This new guidance will be effective for annual reporting periods beginning after December 15, 2017, including interim periods within those annual reporting periods, with early adoption permitted in the first interim period only. We are therefore required to apply this new guidance in our fiscal 2019 interim and annual financial statements. The amendments are to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We are currently assessing the impact that this guidance will have on our consolidated financial statements. There are no other new accounting pronouncements that are expected to have a significant impact on our consolidated financial statements.

Recently Adopted Accounting Pronouncements

Measurement of Inventory

In July 2015, the FASB issued ASU No. 2015-11, “Simplifying the Measurement of Inventory”, which changed the measurement principle for inventory from the lower of cost or market to lower of cost and net realizable value. ASU No. 2015-11 was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2016. As a result, we adopted ASU No. 2015-11 in the first quarter of fiscal 2018 and the adoption of this guidance did not have a significant impact on our consolidated financial statements.

Stock-Based Compensation

In March 2016, the FASB issued ASU No. 2016-09, "Compensation - Stock Compensation (Topic 718): Improvements to Employee Share-Based Payment Accounting". ASU No. 2016-09 was effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2016. Accordingly, we adopted this guidance during the first quarter of fiscal 2018. ASU No. 2016-09 aims to simplify several aspects of accounting and financial reporting for share-based payment transactions. One provision within this pronouncement requires that excess income tax benefits and deficiencies related to share-based payments be recognized within income tax expense as a discrete event in the period in which they occur, rather than within additional paid-in capital on our consolidated balance sheet on a prospective basis. The impact to our results of operations related to this provision through the second quarter of fiscal 2018 was a reduction to income tax expense of $556,000. The impact of this provision on our future results of operations will depend in part on the market prices for the shares of our common stock on the dates there are taxable events related to the share-based awards, and therefore, the impact is difficult to predict. In connection with another provision within ASU No. 2016-09, we have elected to account for forfeitures of share-based awards as an estimate of the number of awards that are expected to vest, which is consistent with our accounting policy prior to adoption.

Also, we adopted the provisions of ASU No. 2016-09 related to changes on the Consolidated Statements of Cash Flows on a retrospective basis. As a result, we no longer classify excess income tax benefits as a financing activity, which increased net cash provided by operating activities and reduced net cash provided by financing activities by $167,000 for the six months ended October 30, 2016. Additionally, we no longer classify payments for employee taxes when common stock shares are withheld to satisfy the employer’s statutory income tax withholding obligation as an operating activity, which increased net cash provided by operating activities and reduced net cash provided by financing activities by $280,000 for the six months ended October 30, 2016.

Recently Issued Accounting Pronouncements

In May 2014, the FASB issued ASU No. 2014-09, which amends ASC Topic 606, Revenue from Contracts with Customers. The amendments in this ASU are intended to enhance the comparability of revenue recognition practices and will be applied to all contracts with customers. Improved disclosures related to the nature, amount, timing, and uncertainty of revenue that is recognized are requirements under the amended guidance. In April 2015, the FASB issued ASU 2015-24, Revenue from Contracts with Customers: Deferral of the Effective Date which proposed a deferral of the effective date by one year, and on July 7, 2015, the FASB decided to delay the effective date by one year. The deferral results in the new revenue standard being effective for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2017. We are therefore required to apply the new revenue guidance in our fiscal 2019 interim and annual financial statements. This ASU can be adopted either retrospectively or as a cumulative-effect adjustment as of the date of adoption. We are currently assessing the impact that this guidance will have on our consolidated financial statements but we expect this guidance to have a material impact on our disclosures in our notes to the consolidated financial statements.

In February 2016, the FASB issued ASU No. 2016-02, Leases (Topic 842), which increases transparency and comparability among companies accounting for lease transactions. The most significant change of this update will require the recognition of lease assets and liabilities on the balance sheet for operating lease arrangements with lease terms greater than twelve months for lessees. This update will require a modified retrospective application which includes a number of optional practical expedients related to the identification and classification of leases commenced before the effective date. This ASU is effective for fiscal years and interim periods within those fiscal years, beginning after December 15, 2018. We are therefore required to apply this guidance in our fiscal 2020 interim and annual financial statements. We are currently assessing the impact that this guidance will have on our consolidated financial statements but we expect this guidance to have a material impact on our financial position as a result of the requirement to recognize right-of-use assets and lease liabilities on our consolidated balance sheets.

In August 2016, the FASB issued ASU No. 2016-15, Statement of Cash Flows (Topic 230): Classification of Certain Cash Receipts and Cash Payments, to address the diversity in how certain cash receipts and cash payments are presented in the statement of cash flows. This new guidance provides clarity around the cash flow classification for eight specific issues in an effort to reduce the current and potential future diversity in practice. This standard, which is to be applied retrospectively, will be effective for the first interim period within annual reporting periods beginning after December 15, 2017, and early adoption is permitted. We are therefore required to apply this new guidance in our fiscal 2019 interim and annual financial statements. We are currently assessing the impact that this guidance will have on our consolidated financial statements.

In October 2016, the FASB issued ASU No. 2016-16, Income Taxes (Topic 740): Intra-Entity Transfers of Assets Other Than Inventory, to reduce the diversity in practice and complexity associated with accounting for the income tax consequences of intra-entity transfers of assets other than inventory. Current GAAP prohibits recognition of deferred income taxes for an intra-entity transfer until the asset has been sold to an outside party. The new pronouncement stipulates that an entity should recognize the income tax consequences of an intra-entity transfer of an asset other than inventory when the transfer occurs. This new guidance will be effective for annual reporting periods beginning after December 15, 2017, including interim periods within those annual reporting periods, with early adoption permitted in the first interim period only. We are therefore required to apply this new guidance in our fiscal 2019 interim and annual financial statements. The amendments are to be applied on a modified retrospective basis through a cumulative-effect adjustment directly to retained earnings as of the beginning of the period of adoption. We are currently assessing the impact that this guidance will have on our consolidated financial statements.

There are no other new accounting pronouncements that are expected to have a significant impact on our consolidated financial statements.