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Long-Term Investments | 12 Months Ended
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Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract] |
Long-Term Investments | 7. LONG-TERM INVESTMENTS As of December 31, 2019 and 2020, the Company held equity investments in several privately-held companies with the carrying value as follows:
|  | Percentage of Ownership |  |  | December 31 |
|  | 2019 |  |  | 2020 |  |  | 2019 |  |  | 2020 |
|  |  |  |  |  |  |  | US$ |  |  | US$ |
Equity securities measured at cost: |  |  |  |  |  |  |  |  |  |  |  |
Cashido Corp. (Cashido) |  |  | 0.6 | % |  |  | 0.6 | % |  |  | — |  |  |  | — |
Vastview Technology, Corp. (Vastview) |  |  | 2.9 | % |  |  | 2.9 | % |  |  | — |  |  |  | — |
Deep Vision, Inc (Deep Vision) |  |  | 16.2 | % |  |  | 16.2 | % |  |  | 3,000 |  |  |  | 5,000 |
|  |  |  |  |  |  |  |  |  |  | 3,000 |  |  |  | 5,000 |
In June 2018, the Company invested US$3,000 thousand in the preferred stock of Deep Vision which is accounted for under the cost method. Deep Vision is a developer of low-power deep-learning processors. In March 2020, the Company invested additional US$2,000 thousand in the SAFE securities of Deep Vision.

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- Definition The entire disclosure for investments accounted for under the cost-method. The carrying amount of such investments may be adjusted, for example, distributions in excess of cost (return of capital) or for other-than-temporary impairments. The cost method and lower-of-cost or market, an adaptation of the cost method, is generally followed for most investments in noncontrolled corporations, in some corporate joint ventures, and to a lesser extent in unconsolidated subsidiaries in which the entity does not have the ability to exercise significant influence. + References No definition available. + Details
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