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Amount of liabilities incurred for goods and services received that are used in an entity's business and related party payables, assumed at the acquisition date.

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Amount of deferred revenue expected to be recognized as such within one year or the normal operating cycle, if longer, assumed at the acquisition date.

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The amount of identifiable intangible assets recognized as of the acquisition date.

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The amount of inventory recognized as of the acquisition date.

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The amount of property, plant, and equipment recognized as of the acquisition date.

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Amount recognized for assets, including goodwill, in excess of (less than) the aggregate liabilities assumed.

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Business Combination - Schedule of Allocation of Acquisition Cost to Assets Acquired and Liabilities Assumed (Detail) - USD ($)	May 03, 2020	Apr. 28, 2019	Apr. 01, 2018
Business Acquisition [Line Items]
Goodwill	$ 0	$ 13,569,000
Read Window Products, LLC [Member]
Business Acquisition [Line Items]
Goodwill			$ 2,107,000
Inventory			1,128,000
Accounts receivable			897,000
Property, plant & equipment			379,000
Other assets			35,000
Deferred revenue			(903,000)
Accounts payable			(719,000)
Accrued expenses			(174,000)
Assets acquired and liabilities assumed, net			5,680,000
Read Window Products, LLC [Member] \| Customer Relationships [Member]
Business Acquisition [Line Items]
Customer relationships			2,247,000
Read Window Products, LLC [Member] \| Trade Names [Member]
Business Acquisition [Line Items]
Tradename			$ 683,000