Leases (Details) - USD ($) $ in Thousands		3 Months Ended	6 Months Ended
		Jun. 30, 2019	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Lease Cost [Abstract]
Operating Lease Cost		$ 134,000	$ 253,000
Amortization of Lease Assets		4,000	7,000
Interest on Lease Liabilities		0	1,000
Variable Lease Cost		97,000	128,000
Short-Term Lease Cost		157,000	228,000
Total Lease Cost		392,000	617,000
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets				$ 566,000
Total		954,000	954,000
Current Liabilities		396,547	396,547		$ 0
Total		988,000	988,000
Finance Lease Net of Accumulated Amortization		34,818,395	34,818,395		33,475,162
Cash Flow Operating And Financing Activities [Abstract]
Operating Leases Non-Cash Leasing Activities			606,000
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced		823,000	823,000
Operating and Finance Leases Liabilities Not Yet Commenced Due in the Remainder of 2019		97,000	97,000
Operating and Finance Leases Liabilities Not Yet Commenced Payments Due 2020		521,000	521,000
Operating and Finance Leases Liabilities Not Yet Commenced Payments Due 2021		205,000	$ 205,000
Minimum
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating and Finance Leases Not Yet Commenced Lease Term			1 month
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		397,000	$ 397,000
Long-Term Liabilities		$ 527,000	$ 527,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Operating Lease Weighted Average Remaining Lease Term (in years)		3 years 3 months 18 days	3 years 3 months 18 days
Operating Lease Weighted Average Discount Rate (%)		3.50%	3.50%
Operating And Finance Leases Future Minimum Payments [Abstract]
July 1, 2019 to December 31, 2019		$ 230,000	$ 230,000
2020		362,000	362,000
2021		177,000	177,000
2022		104,000	104,000
2023		45,000	45,000
2024 and Beyond		63,000	63,000
Total Lease Payments		981,000	981,000
Less: Discount to Present Value		57,000	57,000
Total Lease Liabilities		924,000	924,000
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			104,000
Operating Leases | Investing Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities			146,000
Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		15,000	15,000
Long-Term Liabilities		$ 49,000	$ 49,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Finance Lease Weighted Average Remaining Lease Term (in years)		5 years 3 months 18 days	5 years 3 months 18 days
Finance Lease Weighted Average Discount Rate (%)		3.00%	3.00%
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Finance Lease Liabilities			$ 8,000
Operating And Finance Leases Future Minimum Payments [Abstract]
July 1, 2019 to December 31, 2019		$ 8,000	8,000
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		72,000	72,000
Less: Discount to Present Value		8,000	8,000
Total Lease Liabilities		64,000	64,000
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		895,000	895,000
Property, Plant and Equipment [Member]
Lease Assets and Liabilities [Abstract]
Finance Lease Net of Accumulated Amortization		53,000	53,000
Property, Plant and Equipment [Member] | Finance Leases
Lease Assets and Liabilities [Abstract]
Right-of-Use Assets	[1]	59,000	59,000
Current Portion of Operating Lease Liabilities [Member] | Operating Leases
Lease Assets and Liabilities [Abstract]
Current Liabilities		397,000	397,000
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		527,000	527,000
Long-term Debt [Member] | Finance Leases
Lease Assets and Liabilities [Abstract]
Long-Term Liabilities		$ 49,000	$ 49,000

[1] Finance lease assets are recorded net of accumulated amortization of $53 million at June 30, 2019.