Balance Sheet Components (Schedule of Changes in Carrying Value of Long-term Investments) (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Balance Sheet Related Disclosures [Abstract]
Beginning Balance	[1]	$ 6,303	$ 7,758
Additions			340
Disposals			(1,499)
Impairment		(250)	(549)
Upward adjustments for observable price changes			253
Ending Balance	[1]	$ 6,053	$ 6,303

[1] The balances excluded the investment in limited partnership fund of $1.7 million, $0.9 million and $0.6 million, as of December 31, 2022, 2021 and 2020, respectively. Additionally, the balances as of December 31, 2022 and 2021 excluded an investment in convertible debt securities of $0.2 million and $0.3 million, respectively.