CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES:
Net Income	$ 9,954,236	$ 2,854,487
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	9,711,932	9,823,112
Undistributed Earnings of Other Equity Investment	(283,322)	(413,850)
Noncash Patronage Refund	(105,145)	(96,711)
Stock Issued in Lieu of Cash Payment	194,001	172,232
Distributions from Equity Investments	400,000	576,954
Stock-based Compensation	13,620
Changes in Assets and Liabilities:
Receivables	205,263	(1,000,739)
Income Taxes Receivable	27,559	673,552
Materials, Supplies, and Inventories	(215,042)	651,475
Prepaid Expenses	(67,862)	240,052
Deferred Charges and Other Assets	(12,247)	(5,958)
Accounts Payable	(297,606)	369,800
Accrued Income Taxes	676,508
Other Accrued Taxes	(13,966)	4,608
Other Accrued Liabilities	(163,638)	(348,512)
Deferred Income Tax	(6,013,017)	(1,238,913)
Deferred Compensation	(71,718)	(75,162)
Net Cash Provided by Operating Activities	13,939,556	12,186,427
CASH FLOWS FROM INVESTING ACTIVITIES:
Additions to Property, Plant, and Equipment, Net	(6,267,066)	(5,725,287)
Grants Received for Construction of Plant	167,158
Other, Net	(243,000)	(136,227)
Net Cash Used in Investing Activities	(6,342,908)	(5,861,514)
CASH FLOWS FROM FINANCING ACTIVITIES:
Principal Payments of Long-Term Debt	(2,700,000)	(2,025,000)
Changes in Revolving Credit Facility	(1,634,778)	(2,400,267)
Dividends Paid	(2,035,892)	(1,835,356)
Net Cash Used in Financing Activities	(6,370,670)	(6,260,623)
NET INCREASE (DECREASE) IN CASH	1,225,978	64,290
CASH at Beginning of Period	616,114	551,824
CASH at End of Period	1,842,092	616,114
Supplemental cash flow information:
Cash paid for interest	1,091,276	1,340,120
Net cash paid for income taxes	$ 4,505,709	$ 2,598,500