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Commitments and Contingencies - Right of Use Assets and Liabilities (Details) $ in Thousands | 1 Months Ended | 3 Months Ended | 6 Months Ended |
--- | --- | --- | --- | ---
Jun. 30, 2020 USD ($) ft² | May 31, 2020 USD ($) | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) ft² | Jun. 30, 2021 USD ($) | Jun. 30, 2020 USD ($) ft² | Dec. 31, 2020 USD ($)
Right-of-use assets and lease liabilities capitalized |  |  | 5.50% |  | 5.50% |  |
ROU assets |  |  |  |  | $ 0 |  |
ROU asset |  |  | $ 258 |  | 258 |  | $ 334
Lease liability |  |  | 189 |  | 189 |  | 219
Lease liabilities, long-term |  |  | $ 87 |  | $ 87 |  | $ 140
Right of use assets and liabilities |  |  |  |  |  |  |
Weighted-average remaining lease term |  |  | 1 year 1 month 6 days |  | 1 year 1 month 6 days |  |
Operating lease costs |  |  | $ 84 | $ 51 | $ 166 | $ 110 |
JAPAN |  |  |  |  |  |  |
Area of sublease space | ft² | 500 |  |  | 500 |  | 500 |
Sublease rent per month | $ 1 |  |  |  |  |  |
Singapore |  |  |  |  |  |  |
Area of sublease space | ft² | 4,544 |  |  | 4,544 |  | 4,544 |
Hong Kong |  |  |  |  |  |  |
Area of sublease space | ft² | 3,000 |  |  | 3,000 |  | 3,000 |
Sublease rent per month | $ 2 |  |  |  |  |  |
Cost of revenue |  |  |  |  |  |  |
Right of use assets and liabilities |  |  |  |  |  |  |
Operating lease costs |  |  | 30 | $ 19 | 59 | $ 43 |
Operating expenses |  |  |  |  |  |  |
Right of use assets and liabilities |  |  |  |  |  |  |
Operating lease costs |  |  | $ 54 | $ 32 | $ 107 | $ 67 |
Space located in Irvine, California for executive offices, sales, finance and administration |  |  |  |  |  |  |
Area of sublease space | ft² | 4,351 |  |  | 4,351 |  | 4,351 |
Sublease rent per month | $ 5 |  |  |  |  |  |
Percentage of annual increase in sublease rent | 3.00% |  |  |  |  |  |
Shenzhen, China manufacturing facility |  |  |  |  |  |  |
Area of sublease space | ft² | 14,476 |  |  | 14,476 |  | 14,476 |
Sublease rent per month | $ 8 | $ 7 |  |  |  |  |
Shenzhen, China manufacturing facility | Singapore |  |  |  |  |  |  |
Sublease rent per month | $ 10 |  |  |  |  |  |

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