Pension Plan (Details) - Components of net periodic pension cost - USD ($)	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Pension Plan (Details) - Components of net periodic pension cost [Line Items]
Interest cost	$ 76,000	$ 63,000
Expected return on plan assets	(200,000)	(210,000)
Amortization of net actuarial loss	71,000	80,000
Net periodic pension benefit	$ (53,000)	$ (67,000)