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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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The amount of cash deposited in financial institutions as of the balance sheet date that is insured by the Federal Deposit Insurance Corporation.

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Aggregate dividends paid during the period for each share of common stock outstanding.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period. This excludes costs incurred during the reporting period related to financial services rendered and other revenue generating activities.

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Amount of paid and unpaid cash, stock, and paid-in-kind (PIK) dividends declared, for example, but not limited to, common and preferred stock.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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Note A - Nature of Business and Summary of Significant Accounting Policies (Details Textual)						12 Months Ended
	Dec. 10, 2019 $ / shares	Mar. 15, 2019 $ / shares	Dec. 17, 2018 $ / shares	Jun. 13, 2018 $ / shares	Jan. 01, 2018 USD ($)	Dec. 31, 2019 USD ($) $ / shares	Dec. 31, 2018 USD ($) $ / shares
Cost of Goods and Services Sold, Total						$ 5,657,353	$ 5,343,459
Accounts Receivable, Allowance for Credit Loss, Ending Balance						21,178	$ 16,895
Cash, FDIC Insured Amount						$ 1,174,000
Common Stock, Dividends, Per Share, Cash Paid \| $ / shares		$ 0.55		$ 0.50		$ 1.10	$ 1.05
Dividends, Total						$ 5,053,751	$ 4,824,035
Payments of Ordinary Dividends, Common Stock						5,049,922	4,816,239
Dividends Payable						3,829	7,796
Impairment of Long-Lived Assets Held-for-use						$ 0	0
Number of Vendors						6
Unrecognized Tax Benefits, Ending Balance						$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total							0
Advertising Expense						$ 28,000	13,000
Reclassification of Unrealized Gain (Loss) on Securities from AOCI to Retained Earnings
AOCI Attributable to Parent [Member]
Reclassification of Unrealized Gain (Loss) on Securities from AOCI to Retained Earnings							(466,025)
AOCI Attributable to Parent [Member] \| Accounting Standards Update 2016-01 [Member]
Reclassification of Unrealized Gain (Loss) on Securities from AOCI to Retained Earnings					$ (466,025)
Distributors and Marketing Partners [Member]
Number of Customers						2
Renacidin [Member]
Finite-Lived Intangible Assets, Accumulated Amortization						$ 59,296	44,472
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months						14,824
Annual Dividend [Member]
Common Stock, Dividends, Per Share, Cash Paid \| $ / shares	$ 0.55		$ 0.55
Reclassified Certain Sales Rebates From Cost of Sales to Net Sales [Member]
Cost of Goods and Services Sold, Total							323,836
Shipping and Handling [Member]
Cost of Goods and Services Sold, Total						$ 76,000	$ 81,000
Customer Concentration Risk [Member] \| Distributors and Marketing Partners [Member]
Number of Customers							2
Revenue Benchmark [Member] \| Product Concentration Risk [Member] \| LUBRAJEL and RENACIDIN IRRIGATION [Member]
Concentration Risk, Percentage						93.00%	94.00%
Revenue Benchmark [Member] \| Product Concentration Risk [Member] \| Lubrajel [Member]
Concentration Risk, Percentage						67.00%	72.00%
Revenue Benchmark [Member] \| Product Concentration Risk [Member] \| Renacidin [Member]
Concentration Risk, Percentage						26.00%	22.00%
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member] \| Personal Care [Member] \| Non-US [Member]
Concentration Risk, Percentage						18.00%	19.00%
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member] \| ASI [Member] \| Non-US [Member]
Concentration Risk, Percentage						75.00%	75.00%
Revenue Benchmark [Member] \| Geographic Concentration Risk [Member] \| ASI [Member] \| CHINA
Concentration Risk, Percentage						49.00%	55.00%
Revenue Benchmark [Member] \| Customer Concentration Risk [Member] \| Distributors and Marketing Partners [Member]
Concentration Risk, Percentage						52.00%	56.00%
Accounts Receivable [Member] \| Customer Concentration Risk [Member] \| Distributors and Marketing Partners [Member]
Concentration Risk, Percentage						50.00%	47.00%
Cost of Goods and Service, Product and Service Benchmark [Member] \| Supplier Concentration Risk [Member]
Concentration Risk, Percentage						86.00%	80.00%