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Note 14 - Major Vendors
 12 Months Ended
Dec. 31, 2016
Notes to Financial Statements  
Concentration Risk Disclosure [Text Block]
(1
4
)
Major Vendors
 
Four
vendors, each of whose primary manufacturing facilities are located in Asia, accounted for approximately
73%
and
85%
of inventory purchases in
2016
and
2015,
respectively. Three such vendors accounted for approximately
75%
of inventory purchases in
2014.