Restructuring Charges - Schedule of Restructuring Reserve (Details) (USD $)	3 Months Ended	12 Months Ended
Nov. 01, 2009	May 03, 2015
Restructuring and Related Activities [Abstract]
Restructuring charges	$ 4,200,000us-gaap_RestructuringCharges
Restructuring Reserve [Roll Forward]
Balance as of April 27, 2014		2,911,000us-gaap_RestructuringReserve
Cash payments, net of sublease income		(351,000)us-gaap_PaymentsForRestructuring
Balance as of May 3, 2015		2,560,000us-gaap_RestructuringReserve
Restructuring Reserve [Abstract]
Restructuring accrual expected to be paid in the next twelve months		390,000us-gaap_RestructuringReserveCurrent
Restructuring accrual expected to be paid out from 2014 through 2020		$ 2,200,000us-gaap_RestructuringReserveNoncurrent

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

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-Name Staff Accounting Bulletin (SAB)

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 420

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Carrying amount as of the balance sheet date of known and estimated obligations associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid in the next twelve months or in the normal operating cycle if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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-Name Staff Accounting Bulletin (SAB)

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Carrying amount as of the balance sheet date of known and estimated costs associated with exit from or disposal of business activities or restructurings pursuant to a duly authorized plan, which are expected to be paid after one year or beyond the next operating cycle, if longer. Costs of such activities include those for one-time termination benefits, termination of an operating lease or other contract, consolidating or closing facilities, and relocating employees, and costs associated with an ongoing benefit arrangement, but excludes costs associated with the retirement of a long-lived asset.

+ References

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-Publisher FASB

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