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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 |

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 + Details
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- Definition The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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