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INFORMATION ON GEOGRAPHIC AREAS AND MAJOR CUSTOMERS | 12 Months Ended
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Dec. 31, 2017
Segment Reporting [Abstract] |
INFORMATION ON GEOGRAPHIC AREAS AND MAJOR CUSTOMERS | NOTE 17 - INFORMATION ON GEOGRAPHIC AREAS AND MAJOR CUSTOMERS
| A. | Revenues by Geographic Area - as Percentage of Total Revenue
|  | Year ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
USA |  |  | 52 | % |  |  | 49 | % |  |  | 44 | %
Japan |  |  | 32 |  |  |  | 36 |  |  |  | 41 |
Asia * |  |  | 12 |  |  |  | 12 |  |  |  | 11 |
Europe |  |  | 4 |  |  |  | 3 |  |  |  | 4 |
Total |  |  | 100 | % |  |  | 100 | % |  |  | 100 | %
* Represents revenues from individual countries of less than 10% each. The basis of attributing revenues from external customers to geographic area is based on the headquarter location of the customer issuing the purchase order; actual delivery may be shipped to other geographic area per customer request.
| B. | Long-Lived Assets by Geographic Area
Substantially all of Tower’s long-lived assets are located in Israel, substantially all of Jazz’s and TJT’s long-lived assets are located in the United States and substantially all of TPSCo’s long-lived assets are located in Japan.
|  | As of December 31, |
|  | 2017 |  |  | 2016 |
Israel |  | $ | 218,810 |  |  | $ | 215,511 |
United States |  |  | 214,393 |  |  |  | 203,501 |
Japan |  |  | 201,921 |  |  |  | 197,674 |
Total |  | $ | 635,124 |  |  | $ | 616,686 |
| C. | Major Customers - as Percentage of Net Accounts Receivable Balance
Accounts receivable from significant customers representing 10% or more of the net accounts receivable balance as of December 31, 2017 and 2016, consist of the following customers:
|  | As of December 31, |
|  | 2017 |  |  | 2016 |
Customer 1 |  |  | 13 | % |  |  | 23 | %
Customer 2 |  |  | 9 | % |  |  | 15 | %
D. Major Customers - as Percentage of Total Revenue
|  | Year ended December 31, |
|  | 2017 |  |  | 2016 |  |  | 2015 |
Customer A |  |  | 30 | % |  |  | 35 | % |  |  | 40 | %
Customer B |  |  | 12 |  |  |  | 12 |  |  |  | 13 |
Other customers * |  |  | 15 |  |  |  | 14 |  |  |  | 6 |
| * | Represents sales to two customers accounted for 7% and 8% of sales during 2017, to two customers accounted for 5% and 9% of sales during 2016 and to one customer accounted for 6% during 2015.

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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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -URI http://asc.fasb.org/topic&trid=2134510 + Details
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