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Revenue from Contracts with Customers - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Nov. 01, 2020	Nov. 03, 2019	Nov. 01, 2020	Nov. 03, 2019
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 76,851	$ 69,550	$ 141,315	$ 140,269
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	74,696	66,630	136,860	135,317
Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	2,155	2,920	4,455	4,952
Mattress Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	40,030	35,666	76,133	74,525
Mattress Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	40,030	35,666	76,133	74,525
Upholstery Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	36,821	33,884	65,182	65,744
Upholstery Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	34,666	30,964	60,727	60,792
Upholstery Fabrics [Member] | Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 2,155	$ 2,920	$ 4,455	$ 4,952

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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