Leases (Details) - USD ($) $ in Thousands		3 Months Ended	9 Months Ended
		Sep. 30, 2019	Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Lease Cost [Abstract]
Operating Lease Cost		$ 138,000	$ 391,000
Amortization of Lease Assets		3,000	10,000
Interest on Lease Liabilities		0	1,000
Variable Lease Cost		39,000	167,000
Short-Term Lease Cost		67,000	295,000
Total Lease Cost		247,000	864,000
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets				$ 566,000
Total		898,000	898,000
Current Liabilities		384,348	384,348		$ 0
Total		930,000	930,000
Finance Lease Net of Accumulated Amortization		35,810,197	35,810,197		33,475,162
Cash Flow Operating And Financing Activities [Abstract]
Operating Leases Non-Cash Leasing Activities			703,000
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced		675,000	675,000
Operating and Finance Leases Liabilities Not Yet Commenced Due in the Remainder of 2019		24,000	24,000
Operating and Finance Leases Liabilities Not Yet Commenced Payments Due 2020		446,000	446,000
Operating and Finance Leases Liabilities Not Yet Commenced Payments Due 2021		205,000	$ 205,000
Maximum
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced Lease Term			10 years
Operating Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		384,000	$ 384,000
Long-Term Liabilities		$ 485,000	$ 485,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Operating Lease Weighted Average Remaining Lease Term (in years)		3 years 2 months 12 days	3 years 2 months 12 days
Operating Lease Weighted Average Discount Rate (%)		3.50%	3.50%
Operating And Finance Leases Future Minimum Payments [Abstract]
October 1, 2019 to December 31, 2019		$ 116,000	$ 116,000
2020		377,000	377,000
2021		198,000	198,000
2022		118,000	118,000
2023		50,000	50,000
2024 and Beyond		64,000	64,000
Total Lease Payments		923,000	923,000
Less: Discount to Present Value		(54,000)	(54,000)
Total Lease Liabilities		869,000	869,000
Operating Leases Future Minimum Payments Due [Abstract]
2019					380,000
2020					213,000
2021					86,000
2022					39,000
2023					30,000
2024 and Beyond					62,000
Total Lease Payments					810,000
Operating Leases | Operating Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities			162,000
Operating Leases | Investing Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities			225,000
Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		15,000	15,000
Long-Term Liabilities		$ 46,000	$ 46,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Finance Lease Weighted Average Remaining Lease Term (in years)		4 years 10 months 24 days	4 years 10 months 24 days
Finance Lease Weighted Average Discount Rate (%)		3.00%	3.00%
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Finance Lease Liabilities			$ 10,000
Operating And Finance Leases Future Minimum Payments [Abstract]
October 1, 2019 to December 31, 2019		$ 3,000	3,000
2020		15,000	15,000
2021		15,000	15,000
2022		12,000	12,000
2023		8,000	8,000
2024 and Beyond		14,000	14,000
Total Lease Payments		67,000	67,000
Less: Discount to Present Value		6,000	6,000
Total Lease Liabilities		61,000	61,000
Finance Leases Future Minimum Payments Due [Abstract]
2019					15,000
2020					15,000
2021					15,000
2022					12,000
2023					8,000
2024 and Beyond					14,000
Total Lease Payments					$ 79,000
Other Assets [Member] | Operating Leases
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets		842,000	842,000
Property, Plant and Equipment [Member]
Lease Assets and Liabilities [Abstract]
Finance Lease Net of Accumulated Amortization		57,000	57,000
Property, Plant and Equipment [Member] | Finance Leases
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets	[1]	56,000	56,000
Current Portion of Operating Lease Liabilities [Member] | Operating Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		384,000	384,000
Current Portion of Long-Term Debt [Member] | Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		15,000	15,000
Other Liabilities [Member] | Operating Leases
Lease Assets and Liabilities [Abstract]
Long-Term Liabilities		485,000	485,000
Long-term Debt [Member] | Finance Leases
Lease Assets and Liabilities [Abstract]
Long-Term Liabilities		$ 46,000	$ 46,000

[1] Finance lease assets are recorded net of accumulated amortization of $57 million at September 30, 2019.