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Business Segment Information - Additional Information (Detail) (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Operating Statistics [Line Items]        
Net sales $ 37,110,000 $ 35,736,000 $ 110,239,000 $ 105,755,000
Reversal of accrued contingent consideration 778,000   778,000  
Facility consolidation costs   175,000   1,973,000
Litigation settlement gain       7,468,000
Litigation expense       227,000
Furniture Components [Member]
        
Operating Statistics [Line Items]        
Net sales 15,828,000 15,588,000 46,383,000 44,630,000
Facility consolidation costs   175,000   1,973,000
Litigation settlement gain       7,468,000
Litigation expense       227,000
Net positive impact       5,300,000
Furniture Components [Member] | Ergonomics healthcare product
        
Operating Statistics [Line Items]        
Net sales 1,000,000 600,000 3,300,000 600,000
Discount rate of cash flow     4.00%  
Reversal of accrued contingent consideration 778,000   778,000  
Furniture Components [Member] | Ergonomics healthcare product | Minimum [Member]
        
Operating Statistics [Line Items]        
Additional cash consideration for furniture components ergonomics healthcare 0   0  
Furniture Components [Member] | Ergonomics healthcare product | Maximum [Member]
        
Operating Statistics [Line Items]        
Additional cash consideration for furniture components ergonomics healthcare 1,500,000   1,500,000  
Corporate operating expense [Member]
        
Operating Statistics [Line Items]        
Assets held for sale write-down $ 405,000.0 $ 1,100,000 $ 405,000.0 $ 1,100,000