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Summary of significant accounting policies - Concentrations of credit risk and of significant suppliers (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Summary of significant accounting policies |  |
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- Definition Amount, after allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business, classified as current. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481990/310-10-45-2 + Details
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