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Investments - Available-for-sale Securities (Details) - Commercial paper - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Debt Securities, Available-for-sale [Line Items]    
Amortized Costs $ 1,000 $ 10,498
Gross Unrealized Holding Gains 0 0
Gross Unrealized Holding Losses (3) (2)
Fair Value $ 997 $ 10,496