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Note 14 - Variable Interest Entities ("VIE") and Transactions (Details Textual)
1 Months Ended 12 Months Ended
May 31, 2016
MXN ($)
Feb. 28, 2019
Dec. 31, 2018
USD ($)
Dec. 31, 2017
USD ($)
Dec. 31, 2010
USD ($)
Dec. 31, 2016
Accounts Receivable, Net, Current, Total     $ 10,830,555 $ 11,235,834    
Equity Method Investment, Other than Temporary Impairment     220,000    
Clever Container [Member]            
Noncontrolling Interest, Ownership Percentage by Parent           28.50%
CTI Europe [Member] | Subsequent Event [Member]            
Ownership Percentage   30.00%        
Clever Container [Member]            
Variable Interest Entity, Measure of Activity, Purchases     858,000 955,000    
Accounts Receivable, Net, Current, Total     1,352,000 $ 988,000    
Equity Method Investment, Other than Temporary Impairment     $ 200,000      
Messrs, Schwan and Merrick [Member] | Clever Container [Member] | Subsequent Event [Member]            
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage   28.50%        
Venture Leasing L.L.C [Member]            
Line of Credit Facility, Maximum Borrowing Capacity         $ 1,000,000  
Proceeds from Lines of Credit, Total         $ 700,000  
Flexo Universal [Member] | Venture Leasing Mexico S. A. de R. L [Member]            
Proceeds from Sale of Property, Plant, and Equipment, Total $ 8,700,000          
Venture Leasing L.L.C [Member]            
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage         100.00%  
Venture Leasing Mexico S. A. de R. L [Member]            
Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage         100.00%