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Financial Instruments - Narrative (Details)
3 Months Ended 9 Months Ended
Sep. 30, 2022
USD ($)
Sep. 30, 2022
USD ($)
Investments, All Other Investments [Abstract]    
Interest receivable $ 259,000 $ 259,000
Allowance for credit loss 0 0
Available for sales debt securities, current 39,400,000 39,400,000
Available for sales debt securities, non-current $ 22,600,000 $ 22,600,000