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Geographic / Customer Concentration
 12 Months Ended
Dec. 31, 2023
GEOGRAPHIC CUSTOMER CONCENTRATION [Abstract]  
GEOGRAPHIC / CUSTOMER CONCENTRATION GEOGRAPHIC / CUSTOMER CONCENTRATION
The Company’s chief operating decision maker assesses company-wide performance and allocates resources based on consolidated financial information. As such, we have one reportable segment. During 2023, 2022 and 2021, the majority of our revenue was derived from a limited number of licensees based outside of the United States, primarily in Asia. Substantially all of these revenues were paid in U.S. dollars and were not subject to any substantial foreign exchange transaction risk. The table below lists the countries of the headquarters of our licensees and customers and the total revenue derived from each country or region for the periods indicated (in thousands):
 For the Year Ended December 31,
 202320222021
United States$186,251 $219,744 $169,044 
China258,737 103,922 118,197 
South Korea82,235 90,018 86,677 
Japan10,678 21,946 24,689 
Taiwan9,368 11,621 11,040 
Europe2,319 10,543 15,762 
Total revenue$549,588 $457,794 $425,409 
During 2023, 2022 and 2021, the following licensees or customers accounted for 10% or more of total revenues:
For the Year Ended December 31,
202320222021
Customer A27%—%—%
Customer B24%30%28%
Customer C14%17%18%
Customer D11%13%14%
Customer E
<10%
<10%
10%
As of December 31, 2023, and 2022, we held $324.6 million and $365.3 million of our property, equipment and patents, net of accumulated depreciation and amortization, respectively, of which 91% of the total was within the United States in each of the years presented. As of December 31, 2023 and 2022, we held $29.3 million and $27.2 million of property, equipment and patents, net of accumulated depreciation and amortization, collectively, in Canada and Europe.