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Note 7 - Securities Excluded from the Diluted Per Share Calculation (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Employee Stock Option [Member] | Exercise Price Less Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	12,917	364,149	68,227	714,696
Employee Stock Option [Member] | Exercise Price Greater Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	3,991,332	3,097,501	2,888,332	1,740,000
Warrant [Member] | Exercise Price Less Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)
Warrant [Member] | Exercise Price Greater Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	20,455,414	15,184,565	20,455,414	15,184,565
Exercise Price Less Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	12,917	364,149	68,227	714,696
Exercise Price Greater Than Average Market Price Of Common Shares [Member]
Antidilutive securities (in shares)	24,446,746	18,282,066	23,343,746	16,924,565

X

- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Antidilution



-URI http://asc.fasb.org/extlink&oid=6505113



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Diluted Earnings Per Share



-URI http://asc.fasb.org/extlink&oid=6510752



Reference 3: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Glossary Contingent Stock Agreement



-URI http://asc.fasb.org/extlink&oid=6508534



Reference 4: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 260



-SubTopic 10



-Section 50



-Paragraph 1



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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