Income Taxes - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Schedule Of Income Taxes [Line Items]
Valuation allowance related to gross deferred tax assets	$ 5,565	$ 5,489
Deferred tax assets, net operating loss carry forwards	55,700
Tax assessment from 2016 to 2018	100
PENNSYLVANIA
Schedule Of Income Taxes [Line Items]
Valuation allowance related to gross deferred tax assets	$ 5,500	$ 5,500