Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Detail)

v3.19.3.a.u2
Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Intangible Assets Net Excluding Goodwill [Abstract]      
Amortization expenses of intangible assets $ 2,107 $ 1,685 $ 1,826