Intangible asset, net - Summary of Intangible Asset (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract]
Cost	$ 659	$ 659
Accumulated amortization	(531)	(312)
Net intangible asset	128	347
Amortization expense	$ 200	$ 200
Intangible asset useful life	3 years
Expected amortization expense 2022	$ 100