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Supplementary Balance Sheet Information - Investments Available-for-sale (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Maturity less than 1 year: |  |
Amortized Cost | $ 33,979 | $ 26,293
Gross Unrealized Gains | 31 | 33
Gross Unrealized Losses | (5) | (17)
Fair Market Value | 34,005 | 26,309
Maturity 1 to 2 years: |  |
Amortized Cost | 6,263 | 26,942
Gross Unrealized Gains | 11 | 6
Gross Unrealized Losses | (3) | (89)
Fair Market Value | 6,271 | 26,859
Amortized Cost | 40,242 | 53,235
Gross Unrealized Gains | 42 | 39
Gross Unrealized Losses | (8) | (106)
Fair Market Value | 40,276 | 53,168
Certificate of deposit |  |
Maturity less than 1 year: |  |
Amortized Cost |  | 8,317
Gross Unrealized Gains |  | 16
Gross Unrealized Losses |  | 0
Fair Market Value |  | 8,333
Corporate debt securities |  |
Maturity less than 1 year: |  |
Amortized Cost | 17,192 | 10,948
Gross Unrealized Gains | 27 | 8
Gross Unrealized Losses | (1) | (16)
Fair Market Value | 17,218 | 10,940
Maturity 1 to 2 years: |  |
Amortized Cost | 6,263 | 8,437
Gross Unrealized Gains | 11 | 6
Gross Unrealized Losses | (3) | (10)
Fair Market Value | 6,271 | 8,433
Commercial paper |  |
Maturity less than 1 year: |  |
Amortized Cost | 312 | 6,193
Gross Unrealized Gains | 1 | 9
Gross Unrealized Losses | 0 | 0
Fair Market Value | 313 | 6,202
U.S. government agencies |  |
Maturity less than 1 year: |  |
Amortized Cost |  | 835
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | (1)
Fair Market Value |  | 834
U.S. treasury securities |  |
Maturity less than 1 year: |  |
Amortized Cost | 16,475 |
Gross Unrealized Gains | 3 |
Gross Unrealized Losses | (4) |
Fair Market Value | $ 16,474 |
Maturity 1 to 2 years: |  |
Amortized Cost |  | 18,505
Gross Unrealized Gains |  | 0
Gross Unrealized Losses |  | (79)
Fair Market Value |  | $ 18,426

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