Quarterly report pursuant to Section 13 or 15(d)

Revenue Recognition - Additional Information (Detail)

v3.19.2
Revenue Recognition - Additional Information (Detail)
$ in Millions
Jun. 30, 2019
USD ($)
Dec. 31, 2018
Markets
Revenue from Contract with Customer [Abstract]    
Prepaid commission expense | $ $ 0.7  
Number of market locations | Markets   35