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Discontinued Operations - Additional Information (Detail) (USD $)
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Income (loss) from discontinued operations, net of income taxes $ (108,000) $ (1,631,000)
Net sales associated with the discontinued operations $ 100,000 $ 100,000