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Revenue from Contracts with Customers - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	Apr. 27, 2025	Apr. 28, 2024	Apr. 30, 2023
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 213,237	$ 225,333	$ 234,934
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	201,228	215,346	225,991
Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	12,009	9,987	8,943
Mattress Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	113,906	116,370	110,995
Mattress Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	113,906	116,370	110,995
Upholstery Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	99,331	108,963	123,939
Upholstery Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	87,322	98,976	114,996
Upholstery Fabrics [Member] | Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 12,009	$ 9,987	$ 8,943

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