Note 14 - Concentrations of Credit Risk (Details Textual)	12 Months Ended
Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Cash and Cash Equivalents, at Carrying Value, Ending Balance	$ 641,536	$ 478,397
Cash, Uninsured Amount	$ 489,235	$ 336,756
Customer Concentration Risk [Member] \| Accounts Receivable [Member]
Number of Major Customers	3	4
Accounts Receivable, Net, Total	$ 8,814	$ 9,066

For an unclassified balance sheet, the amount due from customers or clients for goods or services that have been delivered or sold in the normal course of business, reduced to their estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
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-Name Accounting Standards Codification
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