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Note 11 - Segment Information and Foreign Operations (Tables)

9 Months Ended

Sep. 30, 2025

Notes Tables

Revenue from External Customers by Products and Services [Table Text Block]

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2025				2024				2025				2024
Product Type:
Substrates		$	21,259			$	15,007			$	43,633			$	51,655
Raw Materials and Other			6,696				8,638				21,652				22,601
Total		$	27,955			$	23,645			$	65,285			$	74,256

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

		Three Months Ended								Nine Months Ended
		September 30,								September 30,
		2025				2024				2025				2024
Geographical region:
China		$	13,145			$	13,807			$	41,063			$	42,271
Taiwan			9,045				2,140				10,796				10,142
Japan			1,854				1,623				3,276				3,409
Asia Pacific (excluding China, Taiwan and Japan)			347				797				1,555				2,307
Europe (primarily Germany)			3,424				2,720				7,122				11,134
North America (primarily the United States)			140				2,558				1,473				4,993
Total		$	27,955			$	23,645			$	65,285			$	74,256

Schedule of Disclosure on Geographic Areas, Long-Lived Assets in Individual Foreign Countries by Country [Table Text Block]

		As of
		September 30,				December 31,
		2025				2024
Long-lived assets by geographic region, net of depreciation:
North America		$	1,115			$	1,353
China			160,271				160,847
		$	161,386			$	162,200

X

- Definition

Tabular disclosure of the names of foreign countries in which material long-lived assets other than financial instruments, long-term customer relationships of a financial institution, mortgage and other servicing rights, deferred policy acquisition costs, and deferred tax assets are located, and amount of such long-lived assets located in that country or foreign geographic area.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 41
-Subparagraph (b)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-41

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- Definition

Tabular disclosure of entity-wide revenues from external customers for each product or service or each group of similar products or services if the information is not provided as part of the reportable operating segment information.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 40
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482810/280-10-50-40

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- Definition

Tabular disclosure of the names of foreign countries from which revenue is material and the amount of revenue from external customers attributed to those countries. An entity may also provide subtotals of geographic information about groups of countries.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(1))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147483621/220-10-S99-2

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