Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Accrued Liabilities [Abstract]
Payroll and benefits	$ 9,702	$ 2,929
Accrued Liabilities, Reserves, Current	2,784	1,016
Contract with Customer, Liability, Current	6,401	1,225
Other	3,954	2,463
Accrued liabilities	$ 22,841	$ 7,633