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Intangible Assets | 12 Months Ended
--- | ---
Dec. 31, 2019
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Intangible Assets |
Note 9 - Intangible Assets |  |  |  |  |  |
|  |  |  |  | December 31 |
|  |  |  |  | 2018 |  |  | 2019 |
|  | Useful life |  |  | US$ thousands |
Original cost: |  |  |  |  |  |  |  |  |
Capitalization of software development costs |  |  | 3 |  |  |  | 928 |  |  |  | 1,946 |
Licenses |  |  | 3 |  |  |  | 106 |  |  |  | 106 |
|  |  |  |  |  |  | 1,034 |  |  |  | 2,052 |
Accumulated amortization: |  |  |  |  |  |  |  |  |  |  |  |
Capitalization of software development costs |  |  |  |  |  |  | 37 |  |  |  | 274 |
Licenses |  |  |  |  |  |  | 31 |  |  |  | 60 |
|  |  |  |  |  |  | 68 |  |  |  | 334 |
Intangible assets, Net: |  |  |  |  |  |  |  |  |  |  |  |
Capitalization of software development costs |  |  |  |  |  |  | 891 |  |  |  | 1,672 |
Licenses |  |  |  |  |  |  | 75 |  |  |  | 46 |
|  |  |  |  |  |  | 966 |  |  |  | 1,718 |
Amortization expense for the years ended December 31, 2017, 2018 and 2019 were US$ 1,888 thousand, US$ 1,103 thousand and US$ 266 thousand, respectively.

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- Definition The entire disclosure for all or part of the information related to intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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- References No definition available. + Details
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