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Note 8 - Segment Information (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Note 8 - Segment Information (Details) [Line Items]
Number of Reportable Segments			1
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | North America [Member]
Note 8 - Segment Information (Details) [Line Items]
Concentration Risk, Percentage	19.00%	62.00%	26.00%	29.00%

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 275



-SubTopic 10



-Section 50



-Paragraph 18



-URI http://asc.fasb.org/extlink&oid=51801978&loc=d3e6351-108592



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-Publisher FASB



-Name Accounting Standards Codification



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-Paragraph 20



-URI http://asc.fasb.org/extlink&oid=49121117&loc=d3e13531-108611



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-Publisher FASB



-Name Accounting Standards Codification



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-Section 50



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Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

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