Operations (Details)
$ in Millions
1 Months Ended 12 Months Ended
Dec. 31, 2021
USD ($)
Apr. 30, 2014
USD ($)
Dec. 31, 2021
Vote
Operations      
Net proceeds from Offering | $ $ 178.4    
Class A ordinary shares      
Operations      
Number of votes each share is entitled to | Vote     1
Number of Class A shares converted from Class B shares     1
Class B ordinary shares      
Operations      
Number of votes each share is entitled to | Vote     3
IPO | Class A ordinary shares      
Operations      
Proceeds from IPO | $   $ 306.5  
Weimeng      
Operations      
Percentage of Direct/Indirect Economic Interest in VIEs     99.00%
Weimeng Chuangke      
Operations      
Percentage of Direct/Indirect Economic Interest in VIEs     100.00%
Weibo Interactive      
Operations      
Percentage of Direct/Indirect Economic Interest in VIEs     100.00%
Weibo HK      
Operations      
Percentage of Direct/Indirect Economic Interest 100.00%   100.00%
Weibo Technology      
Operations      
Percentage of Direct/Indirect Economic Interest 100.00%   100.00%
WB Online      
Operations      
Percentage of Direct/Indirect Economic Interest 100.00%   100.00%
Weishichangmeng      
Operations      
Percentage of Direct/Indirect Economic Interest 100.00%   100.00%