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Note 8 - Geographic Information and Major Customer Data (Tables) | 9 Months Ended
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Sep. 30, 2022
Notes Tables |
Revenue from External Customers by Geographic Areas [Table Text Block] |
|  | Nine months ended September 30, |  |  | Three months ended September 30, |
|  | 2022 (unaudited) |  |  | 2021 (unaudited) |  |  | 2022 (unaudited) |  |  | 2021 (unaudited) |
Revenues based on customer location: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
United States |  | $ | 22,944 |  |  | $ | 19,290 |  |  | $ | 9,207 |  |  | $ | 8,792 |
Europe and Middle East |  |  | 6,507 |  |  |  | 3,435 |  |  |  | 2,633 |  |  |  | 1,430 |
Asia Pacific (1) |  |  | 71,795 |  |  |  | 65,914 |  |  |  | 21,820 |  |  |  | 22,558 |
Other |  |  | — |  |  |  | 10 |  |  |  | — |  |  |  | 10 |
|  | $ | 101,246 |  |  | $ | 88,649 |  |  | $ | 33,660 |  |  | $ | 32,790 |
(1) China |  | $ | 57,731 |  |  | $ | 54,489 |  |  | $ | 16,159 |  |  | $ | 18,041 |
Schedules of Concentration of Risk, by Risk Factor [Table Text Block] |
|  | Nine months ended September 30, |  |  | Three months ended September 30, |
|  | 2022 (unaudited) |  |  | 2021 (unaudited) |  |  | 2022 (unaudited) |  |  | 2021 (unaudited) |
Customer A |  |  | 11 | % |  |  | 25 | % |  |  | * | ) |  |  | 32 | %
Customer B |  |  | * | ) |  |  | * | ) |  |  | 11 | % |  |  | * | )

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