Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Net Earnings Per Share - Additional Information (Detail)

v3.19.1
Basic and Diluted Net Earnings Per Share - Additional Information (Detail) - shares
3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Earnings Per Share, Basic and Diluted [Abstract]    
Option to purchase shares of common stock outstanding 1,830,222 1,443,087
Options excluded from computation of diluted net income or loss per share 7,195 133,352