Consolidation, Policy [Policy Text Block]

Consolidation -- The consolidated financial statements include the accounts of the Company, its wholly-owned subsidiaries and its majority-owned subsidiary. All material intercompany transactions and accounts have been eliminated in the consolidation.

Foreign Currency Transactions and Translations Policy [Policy Text Block]

Functional Currency / Foreign currency translation -- The functional currency of LiqTech International, Inc., and LiqTech USA, Inc. is the U.S. Dollar. The functional currency of LiqTech Holding, LiqTech Water, LiqTech Plastics, LiqTech Ceramics, LiqTech Water Projects and LiqTech Emission Control is the Danish Krone (“DKK”); the functional currency of LiqTech China is the Renminbi (“RMB”); the functional currency of LiqTech Germany is the Euro; and the functional currency of LiqTech Singapore is the Singapore Dollar. The Company’s reporting currency is the U.S. Dollar for the purpose of these consolidated financial statements. The balance sheet accounts of the foreign subsidiaries are translated into U.S. Dollars at the period-end exchange rates, and all revenue and expenses are translated into U.S. Dollars at the average exchange rates prevailing during the twelve months ended December 31, 2021 and 2020. Translation gains and losses are deferred and accumulated as a component of other comprehensive income (loss) in stockholders’ equity. Transaction gains and losses that arose from exchange rate fluctuations from transactions denominated in a currency other than the functional currency are included in the statement of operations as incurred.

Cash and Cash Equivalents, Policy [Policy Text Block]

Cash, Cash Equivalents and Restricted Cash -- The Company considers all highly liquid debt instruments purchased with a maturity of three months or less to be cash equivalents. As of December 31, 2021, and 2020, the Company held $2,125,695 and $1,515,620, respectively, of restricted cash. The restricted cash is held as security by a local financial institution for ensuring a leasing facility and for payment guarantees issued for the benefit of customers in connection with prepayments of sales orders and for warranties after the delivery of sales orders.

Accounts held in each U.S. institution are insured by the Federal Deposit Insurance Company (“FDIC”) up to $250,000. At December 31, 2021 and December 31, 2020 the Company had $11,346,826 and $0 in excess of the FDIC insured limit, respectively.

Inventory, Policy [Policy Text Block]

Inventory – Inventory directly purchased is carried at the lower of cost or net realizable value, as determined on the first-in, first-out method.

For inventory produced, standard costs that approximate actual cost on the FIFO method are used to value inventory. Standard costs are reviewed at least annually by management, or more often in the event that circumstances indicate a change in cost has occurred.

Work in process and finished goods include material, labor, and production overhead costs. The Company adjusts the value of its inventory to the extent management determines that the cost cannot be recovered due to obsolescence or other factors.

Inventory valuation adjustments for excess and obsolete inventory are calculated based on current inventory levels, movement, expected useful lives, and estimated future demand of the products and spare parts.

Lessee, Leases [Policy Text Block]

Leases -- The Company has elected to not recognize lease assets and liabilities with an initial term of 12 months or less and to not separate lease and non-lease components. The Company’s accounting for finance leases (formerly called capital lease obligations) remains substantially unchanged. Operating lease right-of-use (“ROU”) assets and liabilities are recognized at the commencement date based on the present value of lease payments over the lease term. As most of the Company’s leases do not provide an implicit rate, an incremental borrowing rate based on the information available at the commencement date is used in determining the present value. The Company will use the implicit rate when readily determinable. The operating lease ROU asset also included prepaid lease payments and reduced by accrued lease payments. The Company’s lease terms may include options to extend or terminate the lease when it is reasonably certain that those options will be exercised. Operating lease cost for lease payments will be recognized on a straight-line basis over the lease term.

Goodwill and Intangible Assets, Policy [Policy Text Block]

Goodwill and Intangible Assets -- The purchase price of an acquired company is allocated between intangible assets and the net tangible assets of the acquired business, with the residual purchase price recorded as goodwill. The determination of the value of the intangible assets acquired involves certain judgments and estimates. These judgments can include, but are not limited to, the cash flows that an asset is expected to generate in the future and the appropriate weighted average cost of capital.

Acquired intangible assets with determinable useful lives are amortized on a straight-line or accelerated basis over the estimated periods benefited, ranging from one to ten years. Customer relationships and other non-contractual intangible assets with determinable lives are amortized over periods of five years.

The Company evaluates the recoverability of long-lived assets by comparing the carrying amount of an asset to estimated future net undiscounted cash flows generated by the asset. If such assets are considered to be impaired, the impairment recognized is measured as the amount by which the carrying value of the assets exceeds the fair value of the assets. The evaluation of recoverability involves estimates of future operating cash flows based upon certain forecasted assumptions, including, but not limited to, revenue growth rates, gross profit margins, and operating expenses over the expected remaining useful life of the related asset. A shortfall in these estimated operating cash flows could result in an impairment charge in the future.

Goodwill is not amortized but is evaluated annually for impairment at the reporting unit level or when indicators of a potential impairment are present. The Company estimates the fair value of the reporting unit using the discounted cash flow and market approaches. Forecasts of future cash flows are based on the Company’s best estimate of future net sales and operating expenses, using primarily expected category expansion, pricing, market segment fundamentals, and general economic conditions.

Advertising Cost [Policy Text Block]

Advertising Cost -- Costs incurred in connection with advertising of the Company’s products is expensed as incurred. Advertising cost is included in sales expenses, and total advertising costs amounted to $308,880 and $128,826 for the years ended December 31, 2021 and 2020, respectively.

Income Tax, Policy [Policy Text Block]

Income Taxes -- The Company accounts for income taxes in accordance with FASB ASC Topic 740: Accounting for Income Taxes. This statement requires an asset and liability approach for accounting for income taxes.

Share-based Payment Arrangement [Policy Text Block]

Stock Options and Awards -- During the years presented in the accompanying consolidated financial statements, the Company has granted stock options and awards. The Company accounts for options in accordance with the provisions of FASB ASC Topic 718, Compensation – Stock Compensation. Stock-based compensation costs of $481,105 and $343,780 have been recognized for the vesting of options and stock awards granted to directors, management and certain key employees for the years ended December 31, 2021 and 2020, respectively.

Fair Value Measurement, Policy [Policy Text Block]

Fair Value of Financial Instruments -- The Company accounts for fair value measurements for financial assets and liabilities in accordance with FASB ASC Topic 820. The authoritative guidance, which, among other things, defines fair value, establishes a consistent framework for measuring fair value and expands disclosure for each major asset and liability category measured at fair value on either a recurring or nonrecurring basis. Fair value is defined as the exit price, representing the amount that would either be received to sell an asset or be paid to transfer a liability in an orderly transaction between market participants. As such, fair value is a market-based measurement that should be determined based on assumptions that market participants would use in pricing an asset or liability. As a basis for considering such assumptions, the guidance establishes a three-tier fair value hierarchy, which prioritizes the inputs used in measuring fair value as follows:

	●	Level 1. Observable inputs such as quoted prices in active markets for identical assets or liabilities;
	●	Level 2. Inputs, other than the quoted prices in active markets, that are observable either directly or indirectly; and
	●	Level 3. Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions.

Unless otherwise disclosed, the fair value of the Company’s financial instruments including cash, accounts receivable, other receivables, prepaid expenses, accounts payable, and accrued expenses approximate their recorded values due to their short-term maturities.

New Accounting Pronouncements, Policy [Policy Text Block]

Recent Accounting Pronouncements – In November 2021, the FASB issued ASU 2021-10, Disclosures by Business Entities about Government Assistance: The FASB is issuing this Update to increase the transparency of government assistance including the disclosure of (1) the types of assistance, (2) an entity’s accounting for the assistance, and (3) the effect of the assistance on an entity’s financial statements. The ASU will be effective for annual reporting periods after December 15, 2021. We are still assessing the impact of ASU 2021-10 on our consolidated financial statements.

On August 2020, the FASB issued ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging — Contracts in Entity’s Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity’s Own Equity. This ASU amends the guidance on convertible instruments and the derivatives scope exception for contracts in an entity’s own equity and improves and amends the related EPS guidance for both Subtopics. The ASU will be effective for annual reporting periods after December 15, 2023 and interim periods within those annual periods, and early adoption is permitted in annual reporting periods ending after December 15, 2020. We are still assessing the impact of ASU 2020-06 on our consolidated financial statements.

On March 2020, the FASB issued ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting. This ASU provides temporary optional guidance to ease the potential burden in accounting for reference rate reform. The new guidance provides optional expedients and exceptions for applying GAAP to contract modifications and hedging relationships, subject to meeting certain criteria, that reference LIBOR or another reference rate expected to be discontinued. This ASU is intended to help stakeholders during the global market-wide reference rate transition period and will be in effect for a limited time through December 31, 2022. Adoption is permitted at any time. The Company is currently evaluating the impact on its financial statements.

On March 9, 2020, the FASB issued ASU 2020-03, “Codification Improvements to Financial Instruments.” This ASU was issued to clarify and improve various financial instruments topics. The guidance has various effective dates but is basically effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. The Company adopted ASU 2020-03 effective January 1, 2020 and concluded there was no material impact to the consolidated financial statements.

In December 2019, the FASB issued ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes. This guidance will be effective for entities for the fiscal years, and interim periods within those fiscal years, beginning after December 15, 2020 on a prospective basis, with early adoption permitted. We will adopt the new standard effective March 1, 2021 and do not expect the adoption of this guidance to have a material impact on our consolidated financial statements.

In August 2018, the FASB issued ASU No. 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework – Changes to the Disclosure Requirements for Fair Value Measurement, which modifies the disclosure requirements on fair value measurement by removing, modifying and adding certain disclosures. This ASU is effective for annual periods beginning after December 15, 2019, including interim periods within those annual periods. The Company adopted ASU 2018-13 effective January 1, 2020 and concluded there was no material impact to the consolidated financial statements.

In November 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-18, Restricted Cash that requires companies, in the Statement of Cash Flows, to explain the changes during the period in the total of cash, cash equivalents, and amounts generally described as restricted cash or restricted cash equivalents. Consequently, amounts generally described as restricted cash and restricted cash equivalents should be included with cash and cash equivalents when reconciling the beginning-of-period and end-of-period total amounts shown on the Statement of Cash Flows. For the period ended December 31, 2021, the Company has recorded $2,125,695 as Restricted cash, $15,363,685 as Unrestricted cash, and a total of $17,489,380 as Cash, Cash equivalents and Restricted cash. For the period ended December 31, 2020, the amounts were $1,515,620 in Restricted cash and $11,748,829 in Unrestricted cash.

In June 2016, the Financial Accounting Standards Board (FASB) issued Accounting Standards Update (ASU) 2016-13, Financial Instruments – Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments, including subsequently issued ASUs to clarify the implementation guidance in ASU 2016-13. The amendment introduces new guidance for credit losses on financial assets measured at amortized cost, including finance receivables and trade receivables. Under this new model, expected credit losses are based on relevant information about past events, including historical experience, current conditions and reasonable and supportable forecasts that affect collectability, replacing the previous incurred loss model. This ASU is effective for annual periods beginning after December 15, 2019 and interim periods within those annual periods. The Company adopted ASU 2016-13 effective January 1, 2020 and concluded there was no material impact to the consolidated financial statements.

Other recent accounting pronouncements issued by the FASB did not or are not believed by management to have a material impact on the Company’s present or future financial statements.