Note 14 - Significant Customers / Concentration - Net Sales by Geographical Region (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Net Sales	$ 11,343,177	$ 13,906,394
Reportable Geographical Components [Member] | US And Canada [Member]
Net Sales	1,115,447	689,766
Reportable Geographical Components [Member] | AUSTRALIA
Net Sales	640,322	387,807
Reportable Geographical Components [Member] | South America [Member]
Net Sales	89,438	115,675
Reportable Geographical Components [Member] | Asia [Member]
Net Sales	1,608,822	1,105,272
Reportable Geographical Components [Member] | Europe [Member]
Net Sales	$ 7,889,148	$ 11,607,874