Significant accounting policies - Lease (Details)	Dec. 31, 2023
Minimum
Significant accounting policies
Term of lease (in months)	1 month
Maximum
Significant accounting policies
Term of lease (in months)	60 months 15 days

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 842
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 3
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147478964/842-20-50-3

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Balance Type:	na
Period Type:	duration