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Goodwill and intangible assets - Carrying amount of goodwill (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 18,614	$ 18,614
Impairment of goodwill	(18,614)	0
Goodwill, ending balance	$ 0	$ 18,614

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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