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Note 8 - Significant Customers / Concentration / Disaggregated Revenue - Net Sales by Geographical Region (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net Sales	$ 9,297,186	$ 3,598,028	$ 16,718,384	$ 5,989,410
Reportable Geographical Components [Member] | US And Canada [Member]
Net Sales	255,642	260,525	688,229	369,750
Reportable Geographical Components [Member] | AUSTRALIA
Net Sales	153,401	82,490	215,514	282,793
Reportable Geographical Components [Member] | South America [Member]
Net Sales		24,248		27,676
Reportable Geographical Components [Member] | Asia [Member]
Net Sales	933,693	111,015	2,172,807	928,616
Reportable Geographical Components [Member] | Europe [Member]
Net Sales	$ 7,954,450	$ 3,119,750	$ 13,641,834	$ 4,380,575

X

- Definition

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.

+ References

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

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