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Note 6 - Loan Payable (Tables)
9 Months Ended
Sep. 30, 2016
Notes Tables  
Schedule of Debt [Table Text Block]
   
September 30,
2016
   
December 31,
2015
 
                 
2012 Demand Loan Facilities
    -       3,500,000  
2016 Credit Facility B
    6,000,000       -  
2016 Credit Facility C
    4,989,583       -  
Total loan payable
    10,989,583       3,500,000  
Less: loan payable, current portion
    1,933,110       3,500,000  
Less: unamortized debt discount and issuance costs
    508,665       -  
Loan payable, long-term portion
    8,547,808       -