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(LOSS) Income Per Common Share - Additional Information (Detail) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Stock Options    
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]    
Antidilutive Securities Excluded from Computation of Diluted Income Per Common Share 1,901,696 1,885,711