Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Comprehensive (Loss) Income (Parenthetical)

v3.20.4
Consolidated Statements of Comprehensive (Loss) Income (Parenthetical) - USD ($)
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Statement of Comprehensive Income [Abstract]      
Foreign currency translation adjustment, tax $ 0 $ 0 $ 0