Business concentrations - Summary of Vendors Accounted for 10% or Greater of Accounts Payable (Details) - Vendor Concentration Risk [Member] - Accounts Payable [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Vendor E [Member]
Disclosure Of Vendors With Product Purchases And Accounts Payable For The Periods [Line Items]
Concentration Risk, Percentage	19.00%	17.00%
Vendor F [Member]
Disclosure Of Vendors With Product Purchases And Accounts Payable For The Periods [Line Items]
Concentration Risk, Percentage	20.00%	16.00%
Vendor G [Member]
Disclosure Of Vendors With Product Purchases And Accounts Payable For The Periods [Line Items]
Concentration Risk, Percentage		10.00%