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Balance Sheet Components - Deferred Revenue (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Deferred Revenue |  |
Revenue | $ 10,280 | $ 10,108
Deferred licensing revenue | 3,000 |
RAD-Hard product |  |
Deferred Revenue |  |
Total amount of consideration to be received | 6,500 |
Revenue | 0 |
Deferred licensing revenue | $ 3,000 |

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