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SIGNIFICANT CUSTOMERS AND GEOGRAPHIC NET REVENUES (Tables) | 12 Months Ended
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Dec. 31, 2017
Risks and Uncertainties [Abstract] |
Customers accounted for 10% or more of total net revenues [Table Text Block] | The following customers, distributors of the Company’s products, each accounted for 10% or more of total net revenues:
| Year Ended December 31,
Customer | 2017 |  | 2016 |  | 2015
Avnet | 16 | % |  | 18 | % |  | 21 | %
Powertech Distribution Ltd. | * |  |  | 10 | % |  | 11 | %
Customers representing 10% or more of accounts receivable [Table Text Block] | The following customer, a distributor of the Company’s products, represented 10% or more of accounts receivable:
Customer | December 31, 2017 |  | December 31, 2016
Avnet | 18 | % |  | 24 | %
Geographic net revenues | The Company markets its products globally through its sales personnel and a worldwide network of independent sales representatives and distributors. Geographic net revenues based on “bill to” customer locations were as follows:
| Year Ended December 31,
(In thousands) | 2017 |  | 2016 |  | 2015
United States of America | $ | 16,647 |  |  | $ | 14,948 |  |  | $ | 14,759 |
Hong Kong/China | 227,335 |  |  | 198,858 |  |  | 173,202 |
Taiwan | 50,307 |  |  | 50,324 |  |  | 47,279 |
Korea | 38,012 |  |  | 41,996 |  |  | 34,264 |
Western Europe (excluding Germany) | 48,230 |  |  | 41,214 |  |  | 38,028 |
Japan | 20,769 |  |  | 19,767 |  |  | 16,994 |
Germany | 11,558 |  |  | 7,563 |  |  | 7,802 |
Other | 18,897 |  |  | 14,998 |  |  | 12,281 |
Total net revenues | $ | 431,755 |  |  | $ | 389,668 |  |  | $ | 344,609 |

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