Balance Sheet Components (Summary of Available-for-sale Investments and Restricted Cash) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	$ 267,736
Gross Unrealized Gains	169
Gross Unrealized Losses	(15)
Cash equivalents	27,806
Short-term investments	132,010
Long-term investments	103,365
Restricted cash	4,709	$ 4,475	$ 4,467
Estimated Fair Value	267,890
Money Market Funds Included In Cash Equivalents [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	27,806
Estimated Fair Value	27,806
Money Market Funds Included In Restricted Cash, Noncurrent [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	4,709
Estimated Fair Value	4,709
U.S. Government Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	81,385
Gross Unrealized Gains	94
Estimated Fair Value	81,479
U.S. Treasury Bills [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	39,568
Gross Unrealized Gains	25
Estimated Fair Value	39,593
Corporate Bonds/Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	57,564
Gross Unrealized Gains	19
Gross Unrealized Losses	(12)
Estimated Fair Value	57,571
Agency Bonds/Notes [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	25,147
Gross Unrealized Gains	7
Gross Unrealized Losses	(3)
Estimated Fair Value	25,151
Asset-Backed Securities [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	21,689
Gross Unrealized Gains	22
Estimated Fair Value	21,711
Commercial Paper [Member]
Debt Securities, Available-for-Sale [Line Items]
Amortized Cost	9,868
Gross Unrealized Gains	2
Estimated Fair Value	$ 9,870