Annual report pursuant to Section 13 and 15(d)

Net Income Per Share - Additional Information (Detail)

v3.19.3
Net Income Per Share - Additional Information (Detail) - $ / shares
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
May 23, 2017
Earnings Per Share [Abstract]        
Shares excluded from dilutive shares outstanding because their effect was anti-dilutive 286,449 193,274 220,473  
Exercise price of warrants (in dollars per share)       $ 57.58
ClickPay and BluTrend        
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]        
Weighted average number of shares contingently issuable (in shares) 196,000 0 0