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Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Oct. 27, 2013
Apr. 28, 2013
Oct. 28, 2012
Segment Reporting Information [Line Items]      
Property, plant and equipment $ 30,559 $ 30,594 [1] $ 30,621
Unallocated corporate [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 640 [2] 786 [2] 856 [2]
Unallocated corporate [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 640 786 856
Mattress Fabrics [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 20,500 20,400 21,200
Mattress Fabrics [Member] | Canada [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 7,800 8,200 7,500
Upholstery Fabrics [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 1,100 908 776
Upholstery Fabrics [Member] | China [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 464 265 160
Upholstery Fabrics [Member] | Poland [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment $ 49 $ 57 $ 92
[1] Derived from audited financial statements.
[2] The $640, $856, and $786 at October 27, 2013, October 28, 2012, and April 28, 2013, 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.