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Segment Information - Balance Sheet Information by Operating Segments (Parenthetical) (Detail) (USD $)
In Thousands, unless otherwise specified
Jul. 28, 2013
Apr. 28, 2013
Jul. 29, 2012
Segment Reporting Information [Line Items]      
Property, plant and equipment $ 30,808 $ 30,594 [1] $ 31,016
Unallocated corporate [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 707 [2] 786 [2]  
Unallocated corporate [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 707 786  
Mattress Fabrics [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 20,700 20,400  
Mattress Fabrics [Member] | Canada [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 7,900 8,200  
Upholstery Fabrics [Member] | United States [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 1,100 908  
Upholstery Fabrics [Member] | China [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment 371 265  
Upholstery Fabrics [Member] | Poland [Member]
      
Segment Reporting Information [Line Items]      
Property, plant and equipment $ 53 $ 57  
[1] Derived from audited financial statements.
[2] The $707 and $786 at July 28, 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.