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Credit facility (Details) - USD ($)
$ in Thousands
 1 Months Ended 12 Months Ended
Jan. 31, 2020
Mar. 31, 2022
Disclosure of detailed information about borrowings [line items]    
Amortization term financing costs   60 months
Demand revolving operating credit facility    
Disclosure of detailed information about borrowings [line items]    
Maximum borrowing capacity   $ 25,000
Stand-by acquisition term loan    
Disclosure of detailed information about borrowings [line items]    
Maximum borrowing capacity   $ 50,000
Proceeds from borrowings $ 30,000  
Borrowings, adjustment to interest rate basis   3.00%
Uncommitted portion, stand-by acquisition term loan    
Disclosure of detailed information about borrowings [line items]    
Maximum borrowing capacity   $ 20,000