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Equity-accounted Investments - Financial Information of Synergy Ballard JVCo (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Investment Other Entities [Roll Forward]
Investments, beginning balance	$ 24,026
Equity in loss	(10,131)	$ (11,617)	[1]
Investments, ending balance	13,901	24,026
Synergy Ballard JVCo
Investment Other Entities [Roll Forward]
Investments, beginning balance	0	0
Recognition of 49% profit on inventory not yet sold to third party, net	200	18
Equity in loss	(200)	(18)
Investments, ending balance	$ 0	$ 0
Proportion of ownership interest in joint venture	10.00%
[1] Comparative information has been restated due to a discontinued operation (note 7).

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Investment Other Entities

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Recognition (Deferral) Of Profit On Inventory Sold To Third Parties

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The amount of investments accounted for using the equity method. The equity method is a method of accounting whereby the investment is initially recognised at cost and adjusted thereafter for the post-acquisition change in the investor's share of net assets of the investee. The investor's profit or loss includes its share of the profit or loss of the investee. The investor's other comprehensive income includes its share of the other comprehensive income of the investee. [Refer: At cost [member]]

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