Balance Sheet Components (Schedule of Amortized Cost and Estimated Fair Market Value of Investments Classified as Available-for-Sale Excluding Cash Equivalents) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	$ 108,603	$ 98,499
Unrealized Gains	0	128
Unrealized Losses	(91)	0
Estimated Fair Value	108,512	98,627
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	108,341	98,326
Unrealized Gains	0	128
Unrealized Losses	(91)	0
Estimated Fair Value	108,250	98,454
Corporate Equity Securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost	262
Unrealized Gains	0
Unrealized Losses	0
Estimated Fair Value	$ 262
Convertible debt securities
Schedule Of Available For Sale Securities [Line Items]
Amortized Cost		173
Unrealized Gains		0
Unrealized Losses		0
Estimated Fair Value		$ 173