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Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Jan. 26, 2014
Apr. 28, 2013
Jan. 27, 2013
Segment Reporting Information [Line Items]      
Property, plant and equipment $ 30,115 $ 30,594 [1] $ 30,055
Unallocated corporate [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 644 [2] 786 [2] 792 [2]
Unallocated corporate [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 644 786 792
Mattress Fabrics [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 20,100 20,400 20,600
Mattress Fabrics [Member] | Canada [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 7,700 8,200 7,500
Upholstery Fabrics [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 1,000 908 906
Upholstery Fabrics [Member] | China [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 561 265 155
Upholstery Fabrics [Member] | Poland [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment $ 47 $ 57 $ 86
[1] Derived from audited financial statements.
[2] The $644, $792, and $786 at January 26, 2014, January 27, 2013, 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.