Annual report pursuant to Section 13 and 15(d)

Property and Equipment, Net - Additional Information (Details)

v3.20.1
Property and Equipment, Net - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property Plant And Equipment [Abstract]      
Depreciation expense $ 152 $ 136 $ 65