Pension Plan (Details) - Components of net periodic pension cost - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Pension Plan (Details) - Components of net periodic pension cost [Line Items]
Interest cost	$ 501,000	$ 455,000
Expected return on plan assets	(682,000)	(787,000)
Amortization of net actuarial loss	264,000	229,000
Net periodic pension cost (benefit)	$ 83,000	$ (103,000)