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Supplementary Balance Sheet Information - Intangible Assets, Excluding Goodwill (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Net Carrying Value | $ 9,197 |
Intangible assets, Cost | 18,903 | $ 18,894
Intangible assets, Accumulated Amortization | (9,592) | (9,097)
Intangible assets, Net Carrying Value | 9,311 | 9,797
Trademarks |  |
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets not subject to amortization, Cost | 114 | 114
Intangible assets not subject to amortization, Net Carrying Value | 114 | 114
Patents |  |
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Cost | 1,889 | 1,880
Intangible assets subject to amortization, Accumulated Amortization | (673) | (647)
Intangible assets subject to amortization, Net Carrying Value | 1,216 | 1,233
Purchased Technology |  |
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Cost | 16,900 | 16,900
Intangible assets subject to amortization, Accumulated Amortization | (8,919) | (8,450)
Intangible assets subject to amortization, Net Carrying Value | $ 7,981 | $ 8,450

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