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Discontinued Operations Accrued Balance (Detail) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Total current liabilities of discontinued operations $ 1,040,000  
Total long-term liabilities of discontinued operations 534,000 $ 2,756,000
Ending accrued balance as of September 30, 2015 $ 1,574,000