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Investments in Marketable Debt Securities, Available-for-Sale - Schedule of Gross Realized Gains (Losses) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Investments, Debt and Equity Securities [Abstract]    
Gross realized gains $ 0 $ 0
Gross realized losses $ (1) $ 0