Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) - USD ($) $ in Thousands		Jul. 31, 2016	May 01, 2016		Aug. 02, 2015
Segment Reporting Information [Line Items]
Property, plant and equipment		$ 41,745	$ 39,973	[1]	$ 37,480
United States [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment		25,500	24,800		23,600
United States [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment		847	893		818
Canada [Member] | Mattress Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment		13,900	12,700		11,500
China [Member] | Upholstery Fabrics [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment		612	671		700
Unallocated corporate [Member]
Segment Reporting Information [Line Items]
Property, plant and equipment	[2]	$ 851	$ 929		$ 846

[1] Derived from audited financial statements.

[2] The $851, $846, and $929 at July 31, 2016, August 2, 2015 and May 1, 2016, respectively, represent property, plant, and equipment associated with unallocated corporate departments and corporate departments shared by both the mattress and upholstery fabric segments. Property, plant, and equipment associated with corporate are located in the U.S.