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Other Balance Sheet Accounts Details - Purchased Intangible Assets, net (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Cost | $ 7,986 | $ 7,986
Accumulated Amortization | (7,124) | (5,681)
Net | 862 | 2,305
Developed technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Cost | 5,050 | 5,050
Accumulated Amortization | (4,545) | (3,535)
Net | 505 | 1,515
Patents |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Cost | 2,936 | 2,936
Accumulated Amortization | (2,579) | (2,146)
Net | $ 357 | $ 790

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