Share-based compensation - Summary of Share-based Compensation Expense (Detail) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 1,461,093	$ 5,710,385	$ 3,703,170	$ 13,838,164
Replacement options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	48,013	620,000	279,507	1,296,607
Equity-settled RSUs and PSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	1,413,080	1,127,721	3,423,663	1,910,496
Cash-settled RSUs [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	0	3,015,220	0	5,837,591
Rights to contingent consideration [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation	$ 0	$ 947,444	$ 0	$ 4,793,470