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Investment in Unconsolidated Joint Venture - Narrative (Detail) - USD ($)	3 Months Ended
	Aug. 04, 2019	Jul. 29, 2018	Apr. 28, 2019
Schedule of Equity Method Investments [Line Items]
Income (loss) from investment in unconsolidated joint venture	$ 13,000	$ (77,000)
Investment in unconsolidated joint venture	1,520,000	1,525,000	$ 1,508,000	[1]
CLIH [Member]
Schedule of Equity Method Investments [Line Items]
Unconsolidated joint venture, net Income (loss)	26,000	(154,000)
Income (loss) from investment in unconsolidated joint venture	13,000	(77,000)
Investment in unconsolidated joint venture	$ 1,500,000	$ 1,500,000	$ 1,500,000
[1] Derived from audited financial statements.

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