Leases (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Operating and Finance Leases [Line Items]
Operating Lease, Right-of-Use Asset		$ 566,000
Lease, Cost [Abstract]
Operating Lease Cost	$ 497,000
Amortization of Lease Assets	13,000
Interest on Lease Liabilities	2,000
Variable Lease Cost	138,000
Total Lease Cost	983,000
Lease Assets and Liabilities [Abstract]
Total	826,000
Current Liability	369,365	0
Total	857,000
Finance Lease Net of Accumulated Depreciation	36,938,066	33,475,162
Cash Flow Operating And Financing Activities [Abstract]
Operating Leases Non-Cash Leasing Activities	784,000
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating And Finance Leases Not Yet Commenced	699,000
Operating And Finance Leases Liabilities Not Yet Commenced Due 2020	521,000
Operating And Finance Leases Liabilities Not Yet Commenced Due 2021	178,000
Capital Leases Future Minimum Payments Due [Abstract]
Short-term Lease Cost	333,000
Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liability	15,000
Long-Term Liability	$ 43,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Finance Lease Weighted Average Remaining Lease Term (in years)	4 years 8 months 12 days
Finance Lease Weighted Average Discount Rate (%)	3.00%
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Finance Lease Liabilities	$ 13,000
Operating And Finance Leases Future Minimum Payments [Abstract]
2020	15,000
2021	15,000
2022	12,000
2023	8,000
2024	8,000
2025 and Beyond	6,000
Total Lease Payments	64,000
Less: Discount to Present Value	6,000
Total Lease Liabilities	58,000
Capital 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 Leases Payments		79,000
Operating Leases [Member]
Lease Assets and Liabilities [Abstract]
Current Liability	369,000
Long-Term Liability	$ 430,000
Weighted Average Remaining Lease Term And Discount Rate [Abstract]
Operating Lease Weighted Average Remaining Lease Term (in years)	3 years 2 months 12 days
Operating Lease Weighted Average Discount Rate (%)	3.50%
Operating And Finance Leases Future Minimum Payments [Abstract]
2020	$ 390,000
2021	209,000
2022	126,000
2023	56,000
2024	29,000
2025 and Beyond	40,000
Total Lease Payments	850,000
Less: Discount to Present Value	51,000
Total Lease Liabilities	799,000
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 Leases Payments		$ 810,000
Operating Leases [Member] | Operating Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities	225,000
Operating Leases [Member] | Investing Activities
Cash Flow Operating And Financing Activities [Abstract]
Repayment of Operating Lease Liabilities	$ 270,000
Maximum
Operating And Finance Leases Future Minimum Payments [Abstract]
Operating And Finance Leases Not Yet Commenced Lease Term	10 years
Property, Plant and Equipment
Lease Assets and Liabilities [Abstract]
Finance Lease Net of Accumulated Depreciation	$ 60,000
Property, Plant and Equipment | Finance Leases
Operating and Finance Leases [Line Items]
Operating Lease, Right-of-Use Asset	773,000
Lease Assets and Liabilities [Abstract]
Right-of-Use Asset	53,000
Current Portion of Operating Lease Liabilities | Operating Leases [Member]
Lease Assets and Liabilities [Abstract]
Current Liability	369,000
Current Portion of Long-Term Debt | Finance Leases
Lease Assets and Liabilities [Abstract]
Current Liability	15,000
Other Liabilities | Operating Leases [Member]
Lease Assets and Liabilities [Abstract]
Long-Term Liability	430,000
Long-term Debt [Member] | Finance Leases
Lease Assets and Liabilities [Abstract]
Long-Term Liability	$ 43,000