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Note 6 - Segment Reporting (Details)	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Note 6 - Segment Reporting (Details) [Line Items]
Number of Operating Segments			1
Sales Revenue, Net [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Note 6 - Segment Reporting (Details) [Line Items]
Concentration Risk, Percentage	84.00%	85.00%	85.00%	85.00%
Net Assets, Geographic Area [Member] | Geographic Concentration Risk [Member] | UNITED STATES
Note 6 - Segment Reporting (Details) [Line Items]
Concentration Risk, Percentage			91.00%		90.00%

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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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-Name Accounting Standards Codification



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-Name Accounting Standards Codification



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Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

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