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Note 1 - Summary of Significant Accounting Policies (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2013
Sep. 30, 2012
Sep. 30, 2013
Sep. 30, 2012
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]        
Value Added Tax of Invoice, Percentage     25.00%  
Advertising Expense (in Dollars)     $ 30,556 $ 64,821
Research and Development Expense (in Dollars) 92,276 91,202 350,515 470,502
Share-based Compensation (in Dollars)     1,051,857 97,805
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense (in Dollars)     $ 0 $ 0
LiqTech Asia [Member]
       
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]        
Noncontrolling Interest, Ownership Percentage by Parent 60.00%   60.00%  
LiqTech Germany [Member]
       
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]        
Noncontrolling Interest, Ownership Percentage by Parent 100.00%   100.00%  
LiqTech PTE [Member]
       
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]        
Noncontrolling Interest, Ownership Percentage by Parent 95.00%   95.00%  
Minimum [Member]
       
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]        
Property, Plant and Equipment, Useful Life     3 years  
Finite-Lived Intangible Asset, Useful Life     2 years  
Maximum [Member]
       
Note 1 - Summary of Significant Accounting Policies (Details) [Line Items]        
Property, Plant and Equipment, Useful Life     10 years  
Finite-Lived Intangible Asset, Useful Life     10 years