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Geographic and Significant Customer Information | 12 Months Ended
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Sep. 27, 2019
Segment Reporting [Abstract] |
Geographic and Significant Customer Information | GEOGRAPHIC AND SIGNIFICANT CUSTOMER INFORMATION We have one reportable operating segment that designs, develops, manufactures and markets semiconductors and modules. The determination of reportable operating segments is based on the chief operating decision maker’s ("CODM") definition of the business and the nature and use of financial information provided for the purposes of assessing performance and making operating decisions. The Company's CODM is its President and Chief Executive Officer. The results of operations provided to and analyzed by the CODM are at the consolidated level and accordingly, key resources and assessments of performance are performed at the consolidated level. The Company assesses its determination of operating segments at least annually. We continue to evaluate our internal reporting structure and the potential impact of any changes on our segment reporting. For information regarding revenue by geographic regions, based upon customer locations, see Note 3 - Revenue. Information regarding long-lived assets in different geographic regions is presented below (in thousands):
| As of
| September 27, 2019 |  | September 28, 2018
Long-Lived Assets by Geographic Region |
United States | $ | 116,037 |  |  | $ | 122,888 |
Asia Pacific (1) | 8,917 |  |  | 24,702 |
Other Countries (2) | 7,693 |  |  | 2,333 |
Total | $ | 132,647 |  |  | $ | 149,923 |
(1) Asia Pacific represents Taiwan, Japan, India, Thailand, South Korea, Malaysia, the Philippines, Vietnam and China. (2) No international country or region represented greater than 10% of the total net long-lived assets as of the dates presented, other than the Asia-Pacific region as presented above. The following is a summary of customer concentrations as a percentage of total sales and accounts receivable as of and for the periods presented:
| Fiscal Years
Revenue | 2019 |  | 2018 |  | 2017
Customer A | 16 | % |  | 13 | % |  | 11 | %
Customer B | 7 | % |  | 6 | % |  | 10 | %
| September 27, 2019 |  | September 28, 2018
Accounts Receivable |
Customer A | 24 | % |  | 19 | %
Customer C | 10 | % |  | 26 | %
No other customer represented more than 10% of revenue or accounts receivable in the periods presented in the accompanying consolidated financial statements. In fiscal years 2019, 2018 and 2017, our top ten customers represented an aggregate of 54%, 57% and 52% of total revenue, respectively.

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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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