XML 102 R57.htm IDEA: XBRL DOCUMENT v3.22.0.1
Intangible assets - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Intangible Assets, Net (Excluding Goodwill) [Abstract]    
Amortization expense $ 2.5 $ 1.7