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Shareholders' Equity - Additional Information (Detail) - $ / shares
Jun. 30, 2016
Dec. 31, 2015
Dec. 31, 2014
Class of Stock [Line Items]      
Preferred stock, shares authorized 1,000,000 1,000,000 1,000,000
Preferred stock, par value $ 1.00 $ 1.00 $ 1.00
Warrant [Member] | Assumed In Acquisition [Member]      
Class of Stock [Line Items]      
Exercise price of each class of warrants or rights outstanding $ 518.96 $ 518.96  
Warrant to purchase common stock 95,383 95,383