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Short-term debt - Summary of Short-term Debt (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
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Short-term Debt [Line Items] |  |
Short-term debt | $ 318 | $ 0
Short-term bank loans |  |
Short-term Debt [Line Items] |  |
Short-term debt | 267 | 0
Short-term notes |  |
Short-term Debt [Line Items] |  |
Short-term debt | $ 51 | $ 0

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