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Note 7 - Stockholder's Equity (Details) - RSA Activity - 6 months ended Jun. 30, 2015 - Restricted Stock [Member] - $ / shares
Total
Note 7 - Stockholder's Equity (Details) - RSA Activity [Line Items]  
RSA's Outstanding 2,106,591
RSA's Outstanding, Weighted- Average Stock Price $ 1.86
Granted 1,277,350
Granted $ 1.69
Exercised (552,603)
Exercised $ 2.02
Forfeited or expired (36,383)
Forfeited or expired $ 1.82