Revenue from Contracts with Customers - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	3 Months Ended
	Aug. 01, 2021	Aug. 02, 2020
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 83,047	$ 64,464
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	81,348	62,164
Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	1,699	2,300
Mattress Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	43,058	36,103
Mattress Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	43,058	36,103
Upholstery Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	39,989	28,361
Upholstery Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	38,290	26,061
Upholstery Fabrics [Member] | Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 1,699	$ 2,300