Annual report pursuant to Section 13 and 15(d)

Property, Equipment, and Leasehold Improvements - Additional Information (Detail)

v3.20.1
Property, Equipment, and Leasehold Improvements - Additional Information (Detail) - USD ($)
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Property, Plant and Equipment [Abstract]      
Depreciation expense $ 169,159 $ 151,292 $ 187,249