Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Summary of significant accounting policies - Advertising Expenses (Details)

v3.22.1
Summary of significant accounting policies - Advertising Expenses (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accounting Policies [Abstract]      
Advertising expense $ 8,686 $ 1,093 $ 888