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Note 4 - Property, Plant and Equipment, Net (Details Textual) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Construction in Progress, Gross | $ 21,839 | $ 23,531
Manufacturing Equipment [Member] |  |
Construction in Progress, Gross | 1,200 | 1,400
Construction in Progress, Other Consolidated Subsidiaries [Member] |  |
Construction in Progress, Gross | 3,800 | 4,300
Dingxing and Kazuo [Member] |  |
Construction in Progress, Gross | $ 16,800 | $ 17,900

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- Definition Amount of structure or a modification to a structure under construction. Includes recently completed structures or modifications to structures that have not been placed into service. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 + Details
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Period Type: | instant

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- Details
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Namespace Prefix: |
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Balance Type: |
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |