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Intangible Assets - Schedule of Carrying Amounts and Accumulated Amortization of Intangible Assets (Detail) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Intangible assets with finite lives:
Gross carrying amount	$ 5,687	$ 701
Accumulated amortization	(840)	(428)
Intangible assets, net	4,847	273
Technological know-how
Intangible assets with finite lives:
Gross carrying amount	428	423
Accumulated amortization	(320)	(303)
Intangible assets, net	108	120
Computer software
Intangible assets with finite lives:
Gross carrying amount	333	278
Accumulated amortization	(161)	(125)
Intangible assets, net	172	$ 153
Technology rights
Intangible assets with finite lives:
Gross carrying amount	4,926
Accumulated amortization	(359)
Intangible assets, net	$ 4,567

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- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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