Other Long-Term Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Schedule of Other Long Term Assets [Line Items]
Deferred debt-issuance costs	$ 1,000	$ 1,400
Other long-term assets	6,012	5,323
Software and Maintenance
Schedule of Other Long Term Assets [Line Items]
Other long-term assets	4,800	$ 3,900
Contract Assets
Schedule of Other Long Term Assets [Line Items]
Other long-term assets	$ 100