XML 79 R60.htm IDEA: XBRL DOCUMENT v3.10.0.1
Earning (Loss) Per Share - Additional Information (Detail) - shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
Earnings Per Share [Abstract]      
Antidilutive securities excluded from computation of earnings (loss) per share, amount 881,107 3,011,351 3,175,720