Related party transactions - Narrative (Details) - Lacoop, A.C. and Lacoop II, S. C. - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019
Related Party Transaction [Line Items]
Other receivables, related party	$ 1,761	$ 2,325
Accounts payable, related party	$ (508)	$ 0

Amount for accounts payable to related parties.

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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
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Name:	us-gaap_AccountsPayableRelatedPartiesCurrentAndNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant