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Summary of significant accounting policies, Goodwill and intangible assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($)
Summary of significant accounting policies [Abstract]
Impairment of goodwill and intangible assets	$ 0

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

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- Definition

Total loss recognized during the period from the impairment of goodwill plus the loss recognized in the period resulting from the impairment of the carrying amount of intangible assets, other than goodwill.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration