Balance Sheet Components (Fair Value of Available-For-Sale Investments) (Details) - USD ($) $ in Thousands	Jun. 30, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 184,449	$ 190,131
Gross Unrealized Gains	6	145
Gross Unrealized Losses	(128)	(73)
Estimated Fair Value	184,327	190,203
Cash equivalents	20,805	19,483
Short-term investments	149,344	161,264
Long-term Investments	14,178	9,456
Total	184,327	190,203
Money Market Funds [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,805	19,483
Estimated Fair Value	20,805	19,483
US Treasury Bills [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	11,799	11,896
Gross Unrealized Gains	1	3
Gross Unrealized Losses	(1)
Estimated Fair Value	11,799	11,899
Commercial Paper [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,988	33,160
Gross Unrealized Gains		5
Gross Unrealized Losses	(3)	(15)
Estimated Fair Value	4,985	33,150
Corporate Bonds/Notes [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	33,736	39,398
Gross Unrealized Gains	5	55
Gross Unrealized Losses	(25)	(15)
Estimated Fair Value	33,716	39,438
U.S. Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	99,635	17,501
Gross Unrealized Gains		55
Gross Unrealized Losses	(88)
Estimated Fair Value	99,547	17,556
Agency Bonds/Notes [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	13,486	68,693
Gross Unrealized Gains		27
Gross Unrealized Losses	(11)	(43)
Estimated Fair Value	$ 13,475	$ 68,677

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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