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The percentage of the aggregate refunds recognized during an accounting period due to goods returned by customers (other than under warranty provisions).

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Percentage of refund for allowable sales returns of goods.

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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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Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.

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Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable.

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Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Remaining amortization period of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Amount before tax of foreign currency transaction unrealized gain (loss) recognized in the income statement.

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The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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Present value of lessee's discounted obligation for lease payments from operating lease.

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Amount of lessee's right to use underlying asset under operating lease.

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Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.

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The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

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Note 1 - Nature of Business and Significant Accounting Policies (Details Textual) - USD ($)	1 Months Ended	12 Months Ended
	Jan. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 25, 2019	Jan. 01, 2019	Sep. 11, 2018	Apr. 11, 2018	Jan. 01, 2018	Dec. 31, 2016	Sep. 30, 2015
Foreign Currency Transaction Gain (Loss), Unrealized		$ 32,577	$ 20,659
Advertising Expense		19,300	22,300
Research and Development Expense, Total		473,000	488,000
Contract with Customer, Liability, Total		$ 337,234	$ 367,568
Sales Returns, Goods, Percentage of Refund		100.00%
Sales Returns, Goods, Percentage		0.17%	0.25%
Cash and Cash Equivalents, at Carrying Value, Ending Balance		$ 1,989,974	$ 3,272,788						$ 3,606,817
Revolving Credit Facility [Member]
Line of Credit Facility, Maximum Borrowing Capacity						$ 750,000	$ 2,000,000			$ 3,500,000
Subsequent Event [Member] \| Nutracom, LLC [Member]
Purchase Agreement, Payments Made Per Year	$ 200,000
Subsequent Event [Member] \| Revolving Credit Facility [Member]
Long-term Line of Credit, Total	500,000
Line of Credit Facility, Maximum Borrowing Capacity	$ 750,000			$ 750,000
Accounting Standards Update 2014-09 [Member]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets								$ 367,568
Accounting Standards Update 2016-02 [Member] \| Subsequent Event [Member]
Operating Lease, Right-of-Use Asset					$ 460,000
Operating Lease, Liability, Total					$ 460,000
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life		2 years
Finite-Lived Intangible Assets, Remaining Amortization Period		6 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life		17 years
Finite-Lived Intangible Assets, Remaining Amortization Period		11 years
Computer Equipment and Software [Member] \| Minimum [Member]
Property, Plant and Equipment, Useful Life		3 years
Computer Equipment and Software [Member] \| Maximum [Member]
Property, Plant and Equipment, Useful Life		5 years
Office Equipment and Machinery [Member]
Property, Plant and Equipment, Useful Life		7 years
Real Property [Member]
Property, Plant and Equipment, Useful Life		39 years