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Supplementary Balance Sheet Information - Intangible Assets, Excluding Goodwill (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Net Carrying Value | $ 7,267 |
Intangible assets, Cost | 18,963 | $ 18,991
Intangible assets, Accumulated Amortization | (11,579) | (11,080)
Intangible assets, Net Carrying Value | 7,384 | 7,911
Trademarks |  |
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets not subject to amortization, Cost | 117 | 116
Intangible assets not subject to amortization, Net Carrying Value | 117 | 116
Patents |  |
Finite Lived Intangible Assets [Line Items] |  |
Intangible assets subject to amortization, Cost | 1,946 | 1,975
Intangible assets subject to amortization, Accumulated Amortization | (782) | (752)
Intangible assets subject to amortization, Net Carrying Value | 1,164 | 1,223
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 | (10,797) | (10,328)
Intangible assets subject to amortization, Net Carrying Value | $ 6,103 | $ 6,572

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