Segment Information and Foreign Operations (Tables)

12 Months Ended

Dec. 31, 2022

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,
	2022		2021		2020
Product Type:
Substrates	$	111,094	$	103,026	$	75,587
Raw materials and others		30,024		34,367		19,774
Total	$	141,118	$	137,393	$	95,361

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,
	2022		2021		2020
Geographical region:
China	$	55,414	$	67,394	$	35,150
Taiwan		28,780		16,841		16,485
Japan		11,724		10,112		7,624
Asia Pacific (excluding China, Taiwan and Japan)		4,188		7,540		5,458
Europe (primarily Germany)		20,592		23,069		19,673
North America (primarily the United States)		20,420		12,437		10,971
Total	$	141,118	$	137,393	$	95,361

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,
	2022		2021
Long-lived assets by geographic region, net of depreciation:
North America	$	346	$	1,610
China		162,432		143,129
	$	162,778	$	144,739