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Note 8 - Related Party Notes Payable (Details Textual) - USD ($)
Aug. 01, 2016
May 06, 2016
Jan. 12, 2016
Dec. 30, 2015
Sep. 30, 2017
Dec. 31, 2016
Proceeds from Issuance of Private Placement $ 11,800,000 $ 11,800,000        
Private Placement [Member]            
Repayments of Related Party Debt $ 520,000 $ 2,500,000        
Notes [Member] | China Kingston [Member]            
Loan Facilitation Consideration Lead Financings, Three Consecutive Months Cash Flow, Minimum       $ 0    
Loan Facilitation Consideration Financing Provided By Board and Management on Next Financing, Percentage       9.00%    
Loan Facilitation Consideration, Number of New Appointments to Board       2    
Notes [Member] | Lenders [Member]            
Proceeds from Related Party Debt       $ 3,000,000    
Related Party Transaction, Rate       6.00%    
Due to Related Parties         $ 0 $ 0
Promissory Note 1 [Member] | Board of Directors Chairman [Member]            
Proceeds from Related Party Debt       $ 199,000    
Promissory Note 2 [Member] | Director [Member]            
Proceeds from Related Party Debt       71,000    
Promissory Note 3 [Member] | Director [Member]            
Proceeds from Related Party Debt       20,000    
Promissory Note 4 [Member] | Pioneer Pharma Co. [Member]            
Proceeds from Related Party Debt       $ 1,400,000    
Promissory Note 5 [Member] | Mr. Fu [Member]            
Proceeds from Related Party Debt     $ 1,400,000      
Debt Instrument, Term     3 years