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Other income net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Other income:
Exchange gain / (loss), net	$ (93)	$ 77	$ 101
Rental income	37	50	59
Government subsidies - Employment Support Scheme	69	0	147
Other income, net	$ 13	$ 127	$ 307

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- Definition

Amount of income related to nonoperating activities, classified as other.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(7)(d))
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Income earned by providing the use of assets to an outside party in exchange for a payment or series of payments that is nonoperating in nature.

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-Topic 220
-SubTopic 10
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