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Note 21 - Concentration of Risk (Details Textual)
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Sales Revenue, Net [Member] | Customer Concentration Risk [Member]          
Number of Customers 2 2 3 0  
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer 1 [Member]          
Concentration Risk, Percentage 25.00% 14.00% 14.00%    
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer 2 [Member]          
Concentration Risk, Percentage 16.00% 12.00% 11.00%    
Sales Revenue, Net [Member] | Customer Concentration Risk [Member] | Customer 3 [Member]          
Concentration Risk, Percentage     11.00%    
Accounts Receivable [Member] | Customer Concentration Risk [Member]          
Number of Customers     3   2
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer 1 [Member]          
Concentration Risk, Percentage     15.00%   22.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer 2 [Member]          
Concentration Risk, Percentage     14.00%   14.00%
Accounts Receivable [Member] | Customer Concentration Risk [Member] | Customer 3 [Member]          
Concentration Risk, Percentage     13.00%    
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member]          
Number of Suppliers 2 2 2 2  
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member] | Customer 1 [Member]          
Concentration Risk, Percentage 58.00% 52.00% 68.00% 28.00%  
Cost Of Sales Total [Member] | Supplier Concentration Risk [Member] | Customer 2 [Member]          
Concentration Risk, Percentage 29.00% 16.00% 22.00% 37.00%