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Composition of Certain Financial Statement Captions (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Sep. 30, 2021
Dec. 31, 2020
Accounts payable and other accrued liabilities      
Accounts payable $ 9,248   $ 14,662
Accrued liabilities 25,300   6,237
Accounts payable and other accrued liabilities $ 34,548 $ 34,204 $ 20,899