CONCENTRATION OF RISK (Tables)

9 Months Ended

Sep. 30, 2023

Risks and Uncertainties [Abstract]

Revenues and Accounts Receivable From Our Largest Customers

Revenues and accounts receivable from the Company's largest customers were as follows (in thousands):

	% of Total Revenue for the  Three Months Ended September 30,		% of Total Revenue for the  Nine Months Ended September 30,		Accounts Receivable as of
Customer	2023	2022	2023	2022	September 30, 2023
A	45%	46%	37%	42%	$	12,525
B	20%	23%	23%	26%	$	32,879
C	12%	12%	15%	14%	$	43,314
D	8%	4%	10%	4%	$	20,442

Revenues by Geographic Area

Revenues from outside of North America represented approximately 98% and 97% for the three months ended September 30, 2023 and 2022, respectively, and 98% and 97% for the nine-month periods ended September 30, 2023 and 2022, respectively. Revenues by geographic area are as follows (in thousands):

	Three Months Ended September 30,				Nine Months Ended September 30,
Country	2023		2022		2023		2022
South Korea	$	87,231	$	100,555	$	235,320	$	269,338
China		48,687		52,906		163,634		159,486
Japan		2,019		2,011		5,175		4,456
Other non-U.S. locations		541		976		3,856		1,991
Total non-U.S. locations		138,478		156,448		407,985		435,271
United States		2,599		4,108		10,124		12,316
Total revenue	$	141,077	$	160,556	$	418,109	$	447,587

Long-Lived Assets (Net) by Geographic Area

, net by geographic area are as follows (in thousands):

	September 30, 2023		December 31, 2022
United States	$	119,458	$	117,255
Ireland		40,860		20,270
Other		14,320		5,920
Property and equipment, net	$	174,638	$	143,445