Pension Plan (Details) - Components of net periodic pension cost - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Pension Plan (Details) - Components of net periodic pension cost [Line Items]
Interest cost	$ 76,000	$ 64,000	$ 152,000	$ 127,000
Expected return on plan assets	(200,000)	(210,000)	(400,000)	(420,000)
Amortization of net actuarial loss	72,000	80,000	143,000	160,000
Net periodic pension (benefit) expense	$ (52,000)	$ (66,000)	$ (105,000)	$ (133,000)