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Balance Sheet Components (Schedule of Changes in Carrying Value of Long-term Investments) (Parentheticals) (Details) - USD ($)
$ in Thousands
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Balance Sheet Related Disclosures [Line Items]      
Equity investments $ 8,367 $ 7,879  
Limited partnership fund      
Balance Sheet Related Disclosures [Line Items]      
Equity investments $ 2,300 1,700 $ 900
Convertible debt securities      
Balance Sheet Related Disclosures [Line Items]      
Equity investments   $ 200 $ 200