Balance Sheet Components (Schedule of Investments Classified as Available-for-Sale in Continuous Unrealized Loss Position) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Schedule Of Investment Income Reported Amounts By Category [Line Items]
Estimated Fair Market Value, Less Than 12 Months	$ 98,454	$ 73,800
Gross Unrealized Losses, Less Than 12 Months	0	(320)
Estimated Fair Market Value, 12 Months or Longer	0	0
Gross Unrealized Losses, 12 Months or Longer	0	0
Estimated Fair Market Value, Total	98,454	73,800
Gross Unrealized Losses, Total	0	(320)
U.S. Treasury Securities
Schedule Of Investment Income Reported Amounts By Category [Line Items]
Estimated Fair Market Value, Less Than 12 Months	98,454	73,800
Gross Unrealized Losses, Less Than 12 Months	0	(320)
Estimated Fair Market Value, 12 Months or Longer	0	0
Gross Unrealized Losses, 12 Months or Longer	0	0
Estimated Fair Market Value, Total	98,454	73,800
Gross Unrealized Losses, Total	$ 0	$ (320)