Note 8 - Concentrations - Customers Representing 5% or More of Total Revenue (Details) - USD ($)	9 Months Ended
Sep. 30, 2019	Sep. 30, 2018
Major Customers 1 [Member]
Revenue by customer	$ 82,644	$ 254,018
Major Customers 2 [Member]
Revenue by customer	46,267	117,589
Major Customers 3 [Member]
Revenue by customer	41,213	93,563
Major Customers 4 [Member]
Revenue by customer	38,333	72,557
Major Customers 5 [Member]
Revenue by customer	38,246	44,316
Major Customers 6 [Member]
Revenue by customer	$ 30,293

Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Name:	us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration