Balance Sheet Components (Available-for-Sale Investments in Unrealized Loss Position) (Details) $ in Thousands	Sep. 30, 2022 USD ($)
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	$ 39,050
Unrealized Loss, Less than 12 months	(191)
Corporate Bonds/Notes [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	1,492
Unrealized Loss, Less than 12 months	(13)
U.S. Government Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	35,569
Unrealized Loss, Less than 12 months	(173)
Asset-Backed Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Fair Value, Less than 12 months	1,989
Unrealized Loss, Less than 12 months	$ (5)