Significant Accounting Policies (Policies)	9 Months Ended
Sep. 30, 2024
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	The accompanying unaudited condensed consolidated financial statements of LiqTech International, Inc. (the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q of Regulation S-X. They do not include all the information and footnotes required by GAAP for complete financial statements. The December 31, 2023 consolidated balance sheet data were derived from audited financial statements but does not include all disclosures required by GAAP. However, except as disclosed herein, there has been no material change in the information disclosed in the notes to the consolidated financial statements for the year ended December 31, 2023 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission on March 22, 2024. The interim unaudited condensed consolidated financial statements should be read in conjunction with those consolidated financial statements included in the Company’s Annual Report on Form 10-K. In the opinion of management, all adjustments considered necessary for a fair presentation of the financial statements, consisting solely of normal recurring adjustments, have been made. Operating results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024.
New Accounting Pronouncements, Policy [Policy Text Block]	Recently Issued Accounting Pronouncements In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which requires a public entity to disclose significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about reportable segment’s profit or loss and assets that are currently required annually. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. These amendments are to be applied retrospectively. The Company is currently evaluating the impact this standard will have on its condensed consolidated financial statements. In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which enhances the transparency and decision usefulness of income tax disclosures by requiring; (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. ASU 2023-09 is effective for fiscal years beginning after December 15, 2025, with early adoption permitted. These amendments are to be applied prospectively, with retrospective application permitted. The Company is currently evaluating the impact this standard will have on its condensed consolidated financial statements. The Company currently believes there are no other issued and not yet effective accounting standards that are materially relevant to its condensed consolidated financial statements.

Significant Accounting Policies (Policies)

9 Months Ended

Sep. 30, 2024

Basis of Accounting, Policy [Policy Text Block]

The accompanying unaudited condensed consolidated financial statements of LiqTech International, Inc. (the “Company”) have been prepared in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and with the instructions to Form 10-Q of Regulation S-X. They do not include all the information and footnotes required by GAAP for complete financial statements. The December 31, 2023 consolidated balance sheet data were derived from audited financial statements but does not include all disclosures required by GAAP. However, except as disclosed herein, there has been no material change in the information disclosed in the notes to the consolidated financial statements for the year ended December 31, 2023 included in the Company’s Annual Report on Form 10-K, as filed with the Securities and Exchange Commission on March 22, 2024. The interim unaudited condensed consolidated financial statements should be read in conjunction with those consolidated financial statements included in the Company’s Annual Report on Form 10-K. In the opinion of management, all adjustments considered necessary for a fair presentation of the financial statements, consisting solely of normal recurring adjustments, have been made. Operating results for the three and nine months ended September 30, 2024 are not necessarily indicative of the results that may be expected for the year ending December 31, 2024.

New Accounting Pronouncements, Policy [Policy Text Block]

Recently Issued Accounting Pronouncements

In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures,” which requires a public entity to disclose significant segment expenses and other segment items on an annual and interim basis and to provide in interim periods all disclosures about reportable segment’s profit or loss and assets that are currently required annually. ASU 2023-07 is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. These amendments are to be applied retrospectively. The Company is currently evaluating the impact this standard will have on its condensed consolidated financial statements.

In December 2023, the FASB issued ASU 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures,” which enhances the transparency and decision usefulness of income tax disclosures by requiring; (1) consistent categories and greater disaggregation of information in the rate reconciliation and (2) income taxes paid disaggregated by jurisdiction. It also includes certain other amendments to improve the effectiveness of income tax disclosures. ASU 2023-09 is effective for fiscal years beginning after December 15, 2025, with early adoption permitted. These amendments are to be applied prospectively, with retrospective application permitted. The Company is currently evaluating the impact this standard will have on its condensed consolidated financial statements.

The Company currently believes there are no other issued and not yet effective accounting standards that are materially relevant to its condensed consolidated financial statements.