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Share based payments - Performance Share Units (Details) - PSU - item	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share based payments
Balance at the beginning	63,889	87,500
Granted	18,057	87,500
Exercised	(28,474)
Expired	(13,194)
Balance at the ending	63,889	87,500

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

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- Definition

The number of other equity instruments (ie other than share options) granted in a share-based payment arrangement.

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The number of other equity instruments (ie other than share options) exercised or vested in a share-based payment arrangement.

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The number of other equity instruments (ie other than share options) expired in a share-based payment arrangement.

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The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

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