Accrued Liabilities (Details) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Accrued Liabilities
Employee accrued compensation expense	$ 3,277	$ 12,473
Other accrued liabilities	12,962	11,033
Accrued interest on debt	1,535	9,620
Total accrued liabilities	$ 17,774	$ 33,126