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Summary of significant accounting policies - Strategic Investments (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2022
Sep. 30, 2022
Sep. 30, 2021
Schedule of Investments [Line Items]      
Payments to acquire investments   $ 3,100 $ 0
Investment at cost $ 2,000 2,000  
ZecOps      
Schedule of Investments [Line Items]      
Payments to acquire investments 1,000    
Investment balance 1,000 $ 1,000  
Convertible Promissory Note | SwiftConnect      
Schedule of Investments [Line Items]      
Payments to acquire investments $ 2,000