Revenue from Contracts with Customers - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Oct. 30, 2022	Oct. 31, 2021	Oct. 30, 2022	Oct. 31, 2021
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 58,381	$ 74,561	$ 120,985	$ 157,608
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	56,113	72,298	117,008	153,646
Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	2,268	2,263	3,977	3,962
Mattress Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	26,230	40,883	55,602	83,941
Mattress Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	26,230	40,883	55,602	83,941
Upholstery Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	32,151	33,678	65,383	73,667
Upholstery Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	29,883	31,415	61,406	69,705
Upholstery Fabrics [Member] | Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 2,268	$ 2,263	$ 3,977	$ 3,962