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Segment Information and Foreign Operations (Tables)

12 Months Ended

Dec. 31, 2024

Segment Information and Foreign Operations

Revenues reported by product type

The following table represents revenue amounts (in thousands) by product type:

​	​	​	​	​	​	​	​	​	​	​
​	​	Year Ended								​
​	​	December 31,								​
	​	2024			2023			2022
​	Product Type:	​	​	​	​	​	​	​	​	​
​	Substrates	$	67,748	​	$	47,466	​	$	111,094	​
​	Raw materials and others		31,613	​		28,329	​		30,024	​
​	Total	$	99,361	​	$	75,795	​	$	141,118	​

Revenue reported for products shipped to customers in the corresponding geographic region

The following table represents revenue amounts (in thousands) reported for products shipped to customers in the corresponding geographic region:

​	​	​	​	​	​	​	​	​	​	​
​	​	Year Ended								​
​	​	December 31,								​
	​	2024			2023			2022
​	Geographical region:	​	​	​	​	​	​	​	​	​
​	China	$	56,119	​	$	39,778	​	$	55,414	​
​	Taiwan	​	14,098	​	​	8,651	​	​	28,780	​
​	Japan	​	4,979	​	​	4,641	​	​	11,724	​
​	Asia Pacific (excluding China, Taiwan and Japan)	​	2,818	​	​	3,814	​	​	4,188	​
​	Europe (primarily Germany)	​	13,766	​	​	12,315	​	​	20,592	​
​	North America (primarily the United States)		7,581	​		6,596	​		20,420	​
​	Total	$	99,361	​	$	75,795	​	$	141,118	​

Long-lived assets by geographic region

Long-lived assets consist primarily of property, plant and equipment, and operating lease right-of-use assets are attributed to the geographic location in which they are located. Long-lived assets, net of depreciation, by geographic region were as follows (in thousands):

​	​	​	​	​	​	​	​
​	​	​					​
​	​	As of December 31,					​
​		2024			2023
Long-lived assets by geographic region, net of depreciation:	​	​	​	​	​	​	​
North America	​	$	1,353	​	$	1,631	​
China	​		160,847	​		167,516	​
​	​	$	162,200	​	$	169,147	​

​

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

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-Topic 280
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 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

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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

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-Topic 220
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
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