XML 58 R47.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income (Loss) Per Share - Additional Information (Detail) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2018
Jun. 30, 2017
Jun. 30, 2018
Jun. 30, 2017
Common Stock Equivalents        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Potentially dilutive securities excluded from computation of diluted earnings per common share 25,268,205 21,405,998 25,268,205 22,160,979