Revenue from Contracts with Customers - Disaggregation of Revenue (Detail) - USD ($) $ in Thousands	12 Months Ended
	May 01, 2022	May 02, 2021	May 03, 2020
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 294,839	$ 299,720	$ 256,166
Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	285,781	291,172	245,566
Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	9,058	8,548	10,600
Mattress Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	152,159	157,671	131,412
Mattress Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	152,159	157,671	131,412
Upholstery Fabrics [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	142,680	142,049	124,754
Upholstery Fabrics [Member] | Transferred at Point in Time [Member] | Product [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	133,622	133,501	114,154
Upholstery Fabrics [Member] | Transferred over Time [Member] | Services [Member]
Disaggregation of Revenue [Line Items]
Total Net Sales	$ 9,058	$ 8,548	$ 10,600