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Segments and Major Customers | 12 Months Ended
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Dec. 31, 2019
Segment Reporting [Abstract] |
Business Segments and Major Customers | Segments and Major Customers Operating segments are based upon Rambus’ internal organization structure, the manner in which its operations are managed, the criteria used by its Chief Operating Decision Maker (“CODM”) to evaluate segment performance and availability of separate financial information regularly reviewed for resource allocation and performance assessment. The Company has determined its CODM to be the Chief Executive Officer (“CEO”). In line with the Company’s divestiture of its Payments and Ticketing businesses and its refocus on its semiconductor operations, commencing in the third quarter of 2019, the CEO reviews financial information presented on a consolidated basis for purposes of managing the business, allocating resources, making operating decisions and assessing financial performance. On this basis, the Company is organized and operates as a single segment: high-speed interface IP and chips, and embedded security within the semiconductor space. As of December 31, 2019, the Company has a single operating and reportable segment. Accordingly, no additional disclosure of segment measures of profit or loss or total assets is applicable for all periods presented. The Company has recast the prior-period segment information to reflect the new segment structure. Accounts receivable from the Company’s major customers representing 10% or more of total accounts receivable at December 31, 2019 and 2018, respectively, was as follows:
| As of December 31,
| 2019 |  | 2018
Customer 1 | 19 | % |  | 39 | %
Customer 2 | 14 | % |  | * |
Customer 3 | * |  |  | 12 | %
_________________________________________ * Customer accounted for less than 10% of total accounts receivable in the period Revenue from the Company’s major customers representing 10% or more of total revenue for the years ended December 31, 2019, 2018 and 2017 were as follows:
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
Customer A | * |  |  | * |  |  | 17 | %
Customer B | 10 | % |  | * |  |  | 13 | %
Customer C | * |  |  | * |  |  | 13 | %
Customer D | 14 | % |  | 15 | % |  | * |
Customer E | * |  |  | 11 | % |  | * |
Revenue from customers in the geographic regions based on the location of contracting parties is as follows:
| Years Ended December 31,
| 2019 |  | 2018 |  | 2017
| (In thousands)
USA | $ | 134,526 |  |  | $ | 129,567 |  |  | $ | 165,263 |
Taiwan | 24,118 |  |  | 21,749 |  |  | 9,953 |
South Korea | 3,583 |  |  | 13,421 |  |  | 115,811 |
Japan | 11,877 |  |  | 23,222 |  |  | 23,378 |
Europe | 10,262 |  |  | 15,668 |  |  | 22,597 |
Canada | 3,554 |  |  | 4,960 |  |  | 4,373 |
Singapore | 21,751 |  |  | 19,140 |  |  | 22,554 |
Asia-Other | 14,356 |  |  | 3,474 |  |  | 29,167 |
Total | $ | 224,027 |  |  | $ | 231,201 |  |  | $ | 393,096 |
At December 31, 2019, of the $44.7 million of total property, plant and equipment, approximately $40.3 million were located in the United States, $3.4 million were located in India and $1.0 million were located in other foreign locations. At December 31, 2018, of the $57.0 million of total property, plant and equipment, approximately $50.4 million were located in the United States, $3.8 million were located in India and $2.8 million were located in other foreign locations.

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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