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Computation of Earnings (Loss) Per Share - Additional Information (Detail) - shares
3 Months Ended
Mar. 31, 2016
Mar. 31, 2015
Stock Options [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Restricted share units excluded from calculation of diluted earnings (loss) per share 61,800 59,750
Restricted Stock [Member]    
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]    
Restricted share units excluded from calculation of diluted earnings (loss) per share 0 12,775