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Accrued Liabilities (Details) - USD ($)
$ in Thousands
Jun. 30, 2022
Dec. 31, 2021
Accrued Liabilities    
Employee accrued compensation expense $ 6,863 $ 12,473
Other accrued liabilities 11,972 11,033
Accrued interest on debt 9,675 9,620
Total accrued liabilities $ 28,510 $ 33,126