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Note 7 - Preferred Stock (Tables)
 9 Months Ended
Sep. 30, 2015
Notes Tables  
Allocation Of Net Proceeds From Preferred Stock Financing [Table Text Block]
Net proceeds after transaction costs
 
$
2,679,809
 
Less: Fair value of warrants (recorded to Additional Paid-in Capital)
 
 
(1,695,868
)
Recorded value of Series C Preferred Shares at September 30, 2015
 
$
983,941