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Discontinued Operations - Additional Information (Detail) - USD ($)
3 Months Ended 12 Months Ended
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Discontinued Operations [Line Items]                      
Net loss from discontinued operations $ (300,000) $ (2,700,000) $ (300,000) $ (100,000) $ (100,000) $ (100,000) $ (200,000) $ (3,200,000) $ (3,400,000) $ (3,600,000) $ (400,000)
Discontinued Operations [Member]                      
Discontinued Operations [Line Items]                      
Sales from discontinued operations                 0 0 0
Net loss from discontinued operations                 $ (3,400,000) $ (3,600,000) $ (400,000)