CONCENTRATION OF RISK (Tables)

12 Months Ended

Dec. 31, 2023

Risks and Uncertainties [Abstract]

Revenues and Accounts Receivable From Our Largest Customers

Revenues and accounts receivable from the Company's largest customers for the years ended December 31, 2023, 2022 and 2021 were as follows (in thousands):

	2023			2022			2021
Customer	% of Total Revenue	Accounts Receivable		% of Total Revenue	Accounts Receivable		% of Total Revenue	Accounts Receivable
A	36%	$	38,105	41%	$	11,425	44%	$	10,850
B	23%		30,142	25%		24,440	26%		45,867
C	17%		38,529	16%		22,291	14%		18,557

Revenues by Geographic Area

Revenues by geographic area are as follows (in thousands):

	Year Ended December 31,
Country	2023		2022		2021
South Korea	$	322,509	$	360,640	$	334,835
China		229,727		230,582		192,079
Japan		6,971		5,579		7,358
Other non-U.S. locations		4,411		3,829		3,137
Total non-U.S. locations		563,618		600,630		537,409
United States		12,811		15,989		16,116
Total revenue	$	576,429	$	616,619	$	553,525

Long-Lived Assets (Net) by Geographic Area

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

	December 31,
Country	2023		2022
United States	$	118,250	$	117,255
Ireland		42,203		20,270
Other		14,697		5,920
Total long-lived assets	$	175,150	$	143,445