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Supplementary Balance Sheet Information - Investments Available-for-sale (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Maturity less than 1 year:
Amortized Cost	$ 41,685	$ 33,979
Gross Unrealized Gains	31	31
Gross Unrealized Losses	(4)	(5)
Fair Market Value	41,712	34,005
Maturity 1 to 2 years:
Amortized Cost	8,721	6,263
Gross Unrealized Gains	24	11
Gross Unrealized Losses	(1)	(3)
Fair Market Value	8,744	6,271
Amortized Cost	50,406	40,242
Gross Unrealized Gains	55	42
Gross Unrealized Losses	(5)	(8)
Fair Market Value	50,456	40,276
Corporate debt securities
Maturity less than 1 year:
Amortized Cost	25,388	17,192
Gross Unrealized Gains	26	27
Gross Unrealized Losses	(2)	(1)
Fair Market Value	25,412	17,218
Maturity 1 to 2 years:
Amortized Cost	4,990	6,263
Gross Unrealized Gains	16	11
Gross Unrealized Losses	(1)	(3)
Fair Market Value	5,005	6,271
Commercial paper
Maturity less than 1 year:
Amortized Cost	393	312
Gross Unrealized Gains	0	1
Gross Unrealized Losses	0	0
Fair Market Value	393	313
U.S. government agencies
Maturity less than 1 year:
Amortized Cost	2,216
Gross Unrealized Gains	3
Gross Unrealized Losses	0
Fair Market Value	2,219
Maturity 1 to 2 years:
Amortized Cost	2,533
Gross Unrealized Gains	2
Gross Unrealized Losses	0
Fair Market Value	2,535
U.S. treasury securities
Maturity less than 1 year:
Amortized Cost	13,688	16,475
Gross Unrealized Gains	2	3
Gross Unrealized Losses	(2)	(4)
Fair Market Value	13,688	$ 16,474
Maturity 1 to 2 years:
Amortized Cost	1,198
Gross Unrealized Gains	6
Gross Unrealized Losses	0
Fair Market Value	$ 1,204

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