Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities:
Net Income	$ 50,450	$ 538,314
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities:
Depreciation and Amortization	1,347,305	1,382,235
Gain on the Sale of Equipment	0	(228)
Deferred Income Taxes	68,000	22,000
Changes in Operating Assets and Liabilities:
Accounts Receivable, net	(554,136)	919,993
Inventories, net	(202,117)	1,149,214
Other Current Assets	15,666	103,530
Accounts Payable	(24,156)	(569,651)
Accrued Wages and Salaries	(147,964)	(71,462)
Other Accrued Expenses	(26,101)	(126,904)
Unearned Revenue and Customer Deposits	96,854	(175,510)
Net Cash Provided by Operating Activities	623,801	3,171,531
Cash Flows from Investing Activities:
Capital Expenditures	(824,136)	(1,802,914)
Proceeds from the Sale of Equipment	0	5,000
Proceeds from Certificates of Deposit	6,574,000	7,312,000
Purchases of Certificates of Deposit	(4,733,000)	(6,823,000)
Net Cash Provided by (Used in) Investing Activities	1,016,864	(1,308,914)
Cash Flows from Financing Activities:
Cash Dividends Paid	(502,388)	(1,140,036)
Net Cash Used in Financing Activities	(502,388)	(1,140,036)
Net Increase in Cash and Cash Equivalents	1,138,277	722,581
Beginning of Year	1,429,454	706,873
End of Year	2,567,731	1,429,454
Net Cash Paid (Refunds Received) for Income Taxes
Refunds Received for Income Taxes	$ (25,246)
Net Cash Paid for Income Taxes		$ 30,500