LiqTech International (LIQT) 10-K 22 Mar 23 2022 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Mar. 22, 2023	Jun. 30, 2022
Document Information [Line Items]
Entity Central Index Key	0001307579
Entity Registrant Name	LIQTECH INTERNATIONAL INC
Amendment Flag	false
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2022
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2022
Document Transition Report	false
Entity File Number	001-36210
Entity Incorporation, State or Country Code	NV
Entity Tax Identification Number	20-1431677
Entity Address, Address Line One	Industriparken 22C, DK 2750
Entity Address, City or Town	Ballerup
Entity Address, Country	DK
City Area Code	45
Local Phone Number	31315941
Title of 12(b) Security	Common Stock, $0.001 par value
Trading Symbol	LIQT
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	No
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	true
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	false
Entity Shell Company	false
Entity Public Float			$ 19,749,842
Entity Common Stock, Shares Outstanding		45,271,441
Auditor Firm ID	3627
Auditor Name	Sadler, Gibb & Associates, LLC
Auditor Location	Draper, UT

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Current Assets:
Cash, cash equivalents and restricted cash	$ 16,597,371	$ 17,489,380
Accounts receivable, net of allowance for doubtful accounts of $59,559 and $409,076 at December 31, 2022 and December 31, 2021, respectively	2,310,344	1,957,579
Inventories, net of allowance for excess and obsolete inventory of $663,227 and $268,470 at December 31, 2022 and December 31, 2021, respectively	4,062,001	5,421,027
Contract assets	2,253,295	1,906,510
Prepaid expenses and other current assets	1,720,902	1,292,285
Assets held for sale	723,872	0
Total Current Assets	27,667,785	28,066,781
Long-Term Assets:
Property and equipment, net of accumulated depreciation of $9,046,499 and $7,554,803 at December 31, 2022 and December 31, 2021, respectively	8,296,807	8,858,993
Operating lease right-of-use assets	3,271,997	6,925,807
Deposits and other assets	450,038	628,109
Intangible assets, net of accumulated amortization of $438,250 and $357,231 at December 31, 2022 and December 31, 2021, respectively	212,933	334,743
Goodwill	226,095	240,259
Total Long-term Assets	12,457,870	16,987,911
Total Assets	40,125,655	45,054,692
Current Liabilities:
Accounts payable	1,389,355	1,646,662
Accrued expenses	3,087,206	4,685,665
Current portion of finance lease obligations	399,198	373,824
Current portion of operating lease liabilities	561,182	846,544
Current portion of convertible note payable	0	8,400,000
Contract liabilities	649,557	914,828
Total Current Liabilities	6,086,498	16,867,523
Deferred tax liability	154,645	224,779
Other liabilities, net of current portion	0	346,939
Finance lease obligation, net of current portion	2,384,011	2,499,591
Operating lease liability, net of current portion	2,710,815	6,154,064
Convertible note payable, less current portion	0	6,186,936
Senior promissory notes payable, less current portion	5,480,314	0
Total Long-term liabilities	10,729,785	15,412,309
Total Liabilities	16,816,283	32,279,832
Stockholders' Equity:
Preferred stock; par value $0.001, 2,500,000 shares authorized, 0 shares issued and outstanding at December 31, 2022 and December 31, 2021.	0	0
Common stock; par value $0.001, 100,000,000 shares authorized 43,986,079 and 21,285,706 shares issued and outstanding at December 31, 2022 and December 31, 2021, respectively	43,986	21,285
Additional paid-in capital	96,936,988	70,910,902
Accumulated deficit	(67,351,035)	(53,181,928)
Accumulated other comprehensive loss	(6,320,567)	(4,975,399)
Total Stockholders' Equity	23,309,372	12,774,860
Total Liabilities and Stockholders' Equity	$ 40,125,655	$ 45,054,692

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parentheticals) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Accounts receivable, allowance for doubtful accounts	$ 59,559	$ 409,076
Inventories, allowance for excess and obsolete inventory	663,227	268,470
Property and equipment, accumulated depreciation	9,046,499	7,554,803
Intangible assets, accumulated depreciations	$ 438,250	$ 357,231
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	2,500,000	2,500,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shared outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	43,986,079	21,285,706
Common stock, shares outstanding (in shares)	43,986,079	21,285,706

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue	$ 15,982,438	$ 18,273,442
Cost of Goods Sold	15,415,294	16,697,296
Gross Profit	567,144	1,576,146
Operating Expenses:
Selling expenses	3,669,887	4,564,188
General and administrative expenses	5,701,955	5,836,629
Research and development expenses	1,835,890	1,862,653
Restructuring costs	1,893,166	0
Total Operating Expenses	13,100,898	12,263,470
Loss from Operations	(12,533,754)	(10,687,324)
Other Income (Expense)
Interest and other income	384,058	371,467
Interest expense	(419,942)	(708,176)
Amortization of discount on convertible note	(2,389,128)	(835,331)
Gain on currency transactions	404,162	668,255
Gain on on lease termination	147,452	0
Gain on sale of fixed assets	635	1,113
Total Other Expense	(1,872,763)	(502,672)
Loss Before Income Taxes	(14,406,517)	(11,189,996)
Income Tax Benefit	(237,410)	(63,036)
Net Loss	$ (14,169,107)	$ (11,126,960)
Basic and Diluted Loss Per Share (in dollars per share)	$ (0.40)	$ (0.52)
Basic and Diluted Weighted Average Common Shares Outstanding (in shares)	35,395,466	21,567,112

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Loss - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Net income (loss)	$ (14,169,107)	$ (11,126,960)
Other Comprehensive Loss - Currency Translation, net	(1,345,168)	(1,929,329)
Total Comprehensive Loss	$ (15,514,275)	$ (13,056,289)

Consolidated Statement of Stock

Consolidated Statement of Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
BALANCE (in shares) at Dec. 31, 2020	21,655,461
BALANCE at Dec. 31, 2020	$ 21,655	$ 69,897,698	$ (42,054,968)	$ (3,046,070)	$ 24,818,315
Common stock issued in settlement of RSUs (in shares)	50,245
Common stock issued in settlement of RSUs	$ 50	(50)
Stock-based compensation		481,105			481,105
Currency translation, net				(1,929,329)	(1,929,329)
Net income (loss)			(11,126,960)		(11,126,960)
BALANCE (in shares) at Dec. 31, 2021	21,285,706
BALANCE at Dec. 31, 2021	$ 21,285	70,910,902	(53,181,928)	(4,975,399)	12,774,860
Common shares issued for Convertible Note (in shares)	80,000
Common shares issued for Convertible Note	$ 80	531,649			531,729
Exchange of common stock to prefunded warrants (in shares)	(500,000)
Exchange of common stock to prefunded warrants	$ (500)	500			0
Common stock issued in settlement of RSUs (in shares)	164,523
Common stock issued in settlement of RSUs	$ 165	(165)
Common shares issued for cash at $0.50 per share, net of offering cost of $1,996,469, in May 2022 (in shares)	22,535,850
Common shares issued for cash at $0.50 per share, net of offering cost of $1,996,469, in May 2022	$ 22,536	24,430,992			24,453,528
Warrants issued in connection with Senior Promissory Notes		660,836			660,836
Stock-based compensation		934,423			934,423
Currency translation, net				(1,345,168)	(1,345,168)
Net income (loss)			(14,169,107)		(14,169,107)
BALANCE (in shares) at Dec. 31, 2022	43,986,079
BALANCE at Dec. 31, 2022	$ 43,986	$ 96,936,988	$ (67,351,035)	$ (6,320,567)	$ 23,309,372

Consolidated Statement of Sto_2

Consolidated Statement of Stockholders' Equity (Parentheticals)	12 Months Ended
	Dec. 31, 2022 USD ($) $ / shares
Shares issued, offering cost | $	$ 1,996,469
Shares issued, offering cost per share (in dollars per share) | $ / shares	$ 0.50

Consolidated Statements of Cash

Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities:
Net Income (Loss)	$ (14,169,107)	$ (11,126,960)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operations:
Depreciation and amortization	2,585,881	2,740,241
Amortization of discount on convertible notes payable	2,389,128	835,331
Stock-based compensation	934,423	481,105
Change in deferred tax asset / liability	(55,994)	(63,036)
Loss (Gain) on lease termination	(147,452)	0
Loss (Gain) on sale of equipment	(635)	(1,113)
Changes in assets and liabilities:
Accounts receivable	(460,837)	971,460
Inventory	984,130	(336,651)
Contract assets	(460,743)	610,476
Prepaid expenses and other current assets	(354,307)	479,423
Accounts payable	(158,797)	(532,718)
Accrued expenses	(1,632,897)	798,543
Operating lease liabilities	(544,391)	(945,808)
Contract liabilities	(234,873)	(155,291)
Assets Held for Sale	(712,549)	0
Total Adjustments	2,370,663	3,923,117
Net Cash used in Operating Activities	(12,039,020)	(7,203,843)
Cash Flows from Investing Activities:
Purchase of property and equipment	(1,690,621)	(1,133,378)
Proceeds from sale of property and equipment	635	1,113
Net cash paid for acquisition	0	(317,874)
Net Cash used in Investing Activities	(1,689,986)	(1,450,139)
Cash Flows from Financing Activities:
Payments on finance lease obligation	77,939	(380,334)
Payments on Convertible Note	(16,800,000)	14,283,333
Proceeds from issuance of common stock and prefunded warrants	24,418,612	0
Proceeds from issuance of Senior Promissory Notes	6,000,000	0
Net Cash Provided by Financing Activities	13,696,551	13,902,999
Effect of foreign currency exchange on cash	(859,554)	(1,024,086)
Net Change in Cash, Cash Equivalents and Restricted Cash	(892,009)	4,224,931
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	17,489,380	13,264,449
Cash, Cash Equivalents and Restricted Cash at End of Period	16,597,371	17,489,380
Supplemental Disclosures of Cash Flow Information:
Interest	348,575	635,671
Non-cash financing activities
Common Stock issued in conjunction with convertible note financing	0	531,729
Debt discount on Senior Promissory Notes	695,749	0
Convertible Debt [Member]
Non-cash financing activities
Original issue discount on convertible note	0	1,800,000
Convertible Note debt conversion feature	0	3,048,396
Debt issuance costs on convertible note	$ 0	$ 716,667

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Significant Accounting Policies [Text Block]	NOTE 1 Business and Basis of Presentation The consolidated financial statements include the accounts of LiqTech International, Inc. and its subsidiaries (the “Company”). The terms "Company", “us", "we" and "our" as used in this report refer to the Company and its subsidiaries, which are set forth below. The Company engages in the development, design, production, marketing, and sale of automated filtering systems, ceramic silicon carbide liquid applications, and diesel particulate air filters in the United States, Canada, Europe, Asia, and South America. Set forth below is a description of the Company and each of its subsidiaries: LiqTech International, Inc., a Nevada corporation organized in July 2004, LiqTech USA, a Delaware corporation and a 100% owned subsidiary of the Company formed in May 2011. LiqTech Holding A/S (formerly known as LiqTech International A/S), a Danish corporation, incorporated on January 15, 2000 ( LiqTech NA, Inc. (“LiqTech NA”), incorporated in Delaware on July 1, 2005, January 2021, LiqTech Water A/S (formerly known as LiqTech Systems A/S), a Danish Corporation (“LiqTech Water”), incorporated on September 1, 2009, LiqTech Plastics A/S (formerly known as BS Plastic A/S), a Danish Corporation (“LiqTech Plastics”), acquired on September 1, 2019, LiqTech Ceramics A/S, a Danish corporation (“LiqTech Ceramics”), incorporated on December 20, 2019, LiqTech Water Projects A/S, a Danish corporation (“LiqTech Water Projects”), incorporated on July 28, 2020, LiqTech Emission Control A/S, a Danish corporation (“LiqTech Emission Control”), incorporated on March 1, 2021, LiqTech Environment Technologies (China) Co. Ltd. (“LiqTech China”), incorporated on September 23, 2021, LiqTech PTE Ltd (“LiqTech Singapore”), a 95% owned subsidiary of LiqTech Holding, incorporated in Singapore on January 19, 2012. Consolidation -- Functional Currency / Foreign currency translation -- twelve December 31, 2022 2021. Cash, Cash Equivalents, and Restricted Cash -- three December 31, 2022, 2021, Accounts held in each U.S. institution are insured by the Federal Deposit Insurance Company (“FDIC”) up to $250,000. December 31, 2022 December 31, 2021, Accounts Receivable -- The roll-forward of the allowance for doubtful accounts as of December 31, 2022 December 31, 2021 2022 2021 Allowance for doubtful accounts at the beginning of the period $ 409,076 $ 498,044 Bad debt expense (24,534 ) (28,499 ) Receivables written off during the periods (295,778 ) (24,415 ) Effect of currency translation (29,205 ) (36,054 ) Allowance for doubtful accounts at the end of the period $ 59,559 $ 409,076 The receivables written off during the period 2022 Inventory first first 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 for our products. Contracts Assets / Liabilities not Contract assets also include unbilled receivables, which usually comprise the last invoice remaining after the delivery of the water treatment unit, where revenue is recognized at the transfer of control based upon signed acceptance of the unit by the customer. Most commonly, this invoice is sent to the customer at commissioning of the product or no 12 Assets Held for Sale 1 2 3 4 one 5 6 Leases -- not 12 not not may Property and Equipment -- three ten Goodwill and Intangible Assets -- not Acquired intangible assets with determinable useful lives are amortized on a straight-line or accelerated basis over the estimated periods benefited, ranging from one ten five 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 Goodwill is not Revenue Recognition January 1, 2018, 606, 2015, 2016, 2017 January 1, 2018. The Company sells products throughout the world; sales by geographical region are as follows for the year ended December 31, 2022 2021: % Distribution For the Year Ended December 31 2022 2021 2022 2021 Americas 7 % 17 % $ 1,073,433 $ 3,121,797 Asia-Pacific 21 % 25 % 3,406,420 4,658,070 Europe 59 % 58 % 9,379,337 10,493,575 Middle East & Africa 13 % 0 % 2,123,248 - 100 % 100 % $ 15,982,438 $ 18,273,442 The Company’s sales by product line are as follows for the years ended December 31, 2022 2021: % Distribution For the Year Ended December 31 2022 2021 2022 2021 Water 33 % 39 % $ 5,297,286 $ 7,196,465 Ceramics 43 % 39 % 6,844,861 7,183,868 Plastics 22 % 20 % 3,528,606 3,615,681 Corporate 2 % 2 % 311,685 277,428 100 % 100 % $ 15,982,438 $ 18,273,442 For Water (systems and aftermarket), Ceramics (diesel particulate filters and membranes), and Plastics (components), revenue is recognized when performance obligations specified within the terms of a contract with the customer are satisfied, which occurs when control of the product transfers to the customer or when services are rendered by the Company. The majority of the Company's sales contracts contain performance obligations satisfied at a point in time when title along with risks and rewards of ownership have transferred to the customer. This generally occurs when the product is shipped or accepted by the customer. Revenue for service contracts is recognized as the services are provided. Revenue is measured as the amount of consideration expected to be received in exchange for transferring the goods or providing services. The satisfaction of performance obligations under the terms of a revenue contract generally gives rise to the right to receive payment from the customer. The Company's standard payment terms vary by the type and location of the customer and the products or services offered. Generally, the time between when revenue is recognized and when payment is due is not not For contracts with customers that include multiple performance obligations, judgment is required to determine whether performance obligations specified in these contracts are distinct and should be accounted for as separate revenue transactions for recognition purposes. For such arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price. Standalone selling prices are generally determined based on the prices charged to customers or using expected cost-plus margin. System sales are recognized when the Company transfers control to the customer based upon sales and delivery conditions specified in the sales contract. This typically occurs upon shipment of the system from the production facility but can also occur upon other agreed delivery terms. In connection with the completion of the system, it is normal procedure to issue a FAT (Factory Acceptance Test) asserting that the customer has accepted the performance of the system as it is being shipped from our production facility in Hobro. As part of the performance obligation, the customer is normally offered commissioning services (final assembly and configuration at a place designated by the customer), and this commissioning is therefore considered a second second first Aftermarket sales represent parts, extended warranties, and maintenance services. For the sale of aftermarket parts, the Company transfers control and recognizes revenue when parts are shipped to the customer. When customers are given the right to return eligible parts and accessories, the Company estimates the expected returns based on an analysis of historical experience. The Company adjusts estimated revenues at the earlier of when the most likely amount of consideration expected to be received changes or when the consideration becomes fixed. The Company recognizes revenue for extended warranty and maintenance agreements based on the standalone selling price over the life of the contract. The Company has received long-term contracts for grants from government entities for the development and use of silicon carbide membranes in various water filtration and treatment applications and historically in the installation of various water filtration systems. We measure the transfer of control of the performance obligation on long-term contracts utilizing the cost-to-cost measure of progress, with cost of revenue including direct costs such as labor and materials. Under the cost-to-cost approach, the use of estimated costs to complete each performance obligation is a significant variable in the process of determining recognized revenue and a significant factor in the accounting for such performance obligations. The timing of when we bill our customers is generally dependent upon advance billings terms, milestone billings based on completion of certain phases of the work, or when services are provided or products are shipped. Projects with performance obligations recognized over time that have costs and estimated earnings recognized to date in excess of cumulative billings are reported on our balance sheet as Contract assets. Projects with performance obligations recognized over time that have cumulative billings in excess of costs and estimated earnings recognized to date are reported on our balance sheet as Contract liabilities. The roll-forward of Contract Assets/Liabilities for the year ended December 31, 2022 December 31, 2021 2022 2021 Cost incurred $ 3,860,179 $ 3,381,994 Unbilled project deliveries 950,105 454,158 VAT 229,006 542,255 Other receivables 45,814 60,158 Prepayments (3,363,039 ) (2,947,736 ) Deferred Revenue (118,327 ) (499,146 ) $ 1,603,738 $ 991,682 Distributed as follows: Contract assets $ 2,253,295 $ 1,906,510 Contract liabilities (649,557 ) (914,828 ) $ 1,603,738 $ 991,682 Advertising Cost -- December 31, 2022 2021, Research and Development Cost -- December 31, 2022 2021 Income Taxes -- 740: Income/(Loss) Per Share -- 260, not Stock Awards -- 718, December 31, 2022 2021, Fair Value of Financial Instruments -- 820. three ● Level 1. ● Level 2. ● Level 3. no 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. Accounting Estimates -- Recent Accounting Pronouncements March 2022, 2022 02, 326 January 1, 2023, not In November 2021, 2021 10, 1 2 3 January 1, 2022. not In August 2020, 2020 06 2020 06 no 2020 06 no 2020 06 December 15, 2021, 2020 06 December 15, 2023, no December 15, 2020, 2020 06 January 1, 2022, In March 2020, 2020 4 848 December 31, 2022. not In June 2016, 2016 13, 326 December 15, 2022. not

Note 2 - Going Concern

Note 2 - Going Concern	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Substantial Doubt about Going Concern [Text Block]	NOTE 2 GOING CONCERN The accompanying consolidated financial statements have been prepared in conformity with generally accepted accounting principles of the United States of America, which contemplate continuation of the Company as a going concern; however, the Company has incurred significant recent losses, which raises substantial doubt about the ability of the Company to continue as a going concern for a period of one no not

Note 3 - Restructuring Costs

Note 3 - Restructuring Costs	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Restructuring and Related Activities Disclosure [Text Block]	NOTE 3 RESTRUCTURING COSTS During the second 2022, CEO separation May 10, 2022, May 12, 2022. March 17, 2022. DKK1,605,000 six Terminated employees second 2022, No China close-down second 2022, Capex commitments second third fourth Write-downs -- The Company’s restructuring costs are as follows for the year ended December 31, 2022, December 31, 2022: December 31, 2022 CEO separation $ 228,975 Terminated employees 158,199 China close-down 275,445 Capex commitments 813,994 Write-downs 416,553 $ 1,893,166 The following table displays a roll-forward of the restructuring accruals, presented within “accrued expenses”, for the year ended December 31, 2022 2021: 2022 2021 Restructuring accruals, January 1 $ - $ - Restructuring costs, net 1,893,166 - Cash payments (1,476,613 ) - Asset impairments (416,553 ) - Restructuring accruals, December 31 $ - $ -

Note 4 - Inventory

Note 4 - Inventory	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE 4 Inventory consisted of the following at December 31, 2022 December 31, 2021: 2022 2021 Furnace parts and supplies $ 66,495 $ 213,224 Raw materials 2,474,227 2,144,067 Work in process 982,973 1,671,290 Finished goods and filtration systems 1,201,533 1,660,916 Reserve for excess and obsolescence (663,227 ) (268,470 ) Net Inventory $ 4,062,001 $ 5,421,027 Inventory valuation adjustments for excess and obsolete inventory are calculated based on current inventory levels, movements, expected useful lives, and estimated future demand for the products. The increase in the reserve for excess and obsolescence is mainly explained by changes in product and sales mix, due to both market driven and strategic changes implemented during the year, and furthermore new and more conservative processes implemented as part of the ERP implementation.

Note 5 - Property and Equipment

Note 5 - Property and Equipment	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	NOTE 5 - PROPERTY AND EQUIPMENT Property and equipment consisted of the following on December 31, 2022 December 31, 2021: Useful Life 2022 2021 Production equipment 3 - 10 $ 8,027,589 $ 7,425,145 Production equipment - finance lease 3 - 10 3,625,558 3,066,623 Lab equipment 3 - 10 118,935 117,770 Computer equipment 3 - 5 1,070,437 1,005,223 Vehicles 3 - 5 26,020 90,819 Furniture and fixture 5 1,141,424 1,166,071 Furniture and fixture - finance lease 5 252,397 268,208 Leasehold improvements 5 - 10 3,080,946 3,273,940 17,343,306 16,413,799 Less Accumulated Depreciation (8,501,846 ) (7,218,468 ) Less Accumulated Depreciation - finance lease (544,653 ) (336,338 ) Net Property and Equipment $ 8,296,807 $ 8,858,993 Depreciation expense amounted to $2,007,112 and $1,945,489 for the year ended December 31, 2022 2021, $2,007,112 December 31, 2022,

Note 6 - Leases

Note 6 - Leases	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Lessee, Operating and Finance Leases [Text Block]	NOTE 6 - LEASES The Company leases certain vehicles, real property, production equipment, and office equipment under lease agreements. The Company evaluates each lease to determine its appropriate classification as an operating lease or finance lease for financial reporting purposes. The majority of our operating leases are non-cancelable operating leases for production and office space in Hobro, Aarhus, and Copenhagen, Denmark. The lease agreements expire on November 30, 2034, August 31, 2024, August 31, 2028, second 2022, During the year ended December 31, 2022, During the year ended December 31, 2022, Supplemental balance sheet information related to leases as of December 31, 2022 2021 December 31, 2022 December 31, 2021 Operating leases Operating lease right-of-use assets $ 3,271,997 $ 6,925,807 Operating lease liabilities – current $ 561,182 $ 846,544 Operating lease liabilities – long-term 2,710,815 6,154,064 Total operating lease liabilities $ 3,271,997 $ 7,000,608 Finance leases Property and equipment, at cost $ 3,877,955 $ 3,334,830 Accumulated depreciation (544,653 ) (336,337 ) Property and equipment, net $ 3,333,302 $ 2,998,494 Finance lease liabilities – current $ 399,198 $ 373,824 Finance lease liabilities – long-term 2,384,011 2,499,591 Total finance lease liabilities $ 2,783,209 $ 2,873,415 Weighted average remaining lease term: Operating leases 9.6 8.9 Finance leases 5.4 5.9 Weighted average discount rate: Operating leases 6.2 % 6.5 % Finance leases 2.2 % 2.8 % Maturities of lease liabilities at December 31, 2022 Operating lease Finance lease 2023 $ 745,898 $ 516,175 2024 604,324 517,076 2025 315,007 513,658 2026 304,595 478,441 2027 304,595 1,016,291 Thereafter 2,056,019 190,659 Total payment under lease agreements 4,330,439 3,232,300 Less imputed interest (1,058,442 ) (449,091 ) Total lease liability $ 3,271,997 $ 2,783,209

Note 7 - Intangible Assets

Note 7 - Intangible Assets	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	NOTE 7 At December 31, 2022 December 31, 2021, Intangible assets consisted of the following at December 31, 2022 December 31, 2021: 2022 2021 Customer relationships $ 473,308 $ 502,957 Patent cost 177,875 189,017 651,183 691,974 Less Accumulated amortization (438,250 ) (357,231 ) Intangible assets, net $ 212,933 $ 334,743 Amortization expense amounted to $81,019 and $108,471 for the year ended December 31, 2022 2022, Expected future amortization expense for the years ended are as follows: Year ending December 31, Amortization Expenses 2023 102,077 2024 70,523 2025 7,415 2026 7,415 2027 7,415 Thereafter 18,088 $ 212,933

Note 8 - Lines of Credit

Note 8 - Lines of Credit	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 8 In connection with certain orders, the Company provides to customers a working guarantee, prepayment guarantee, or security bond. For that purpose, the Company has a guaranteed credit line of EUR 1,350,000 (approx. $1,440,000) secured by a cash deposit. As of December 31, 2022,

Note 9 - Long-term Debt

Note 9 - Long-term Debt	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Long-Term Debt [Text Block]	N OTE 9 LONG-TERM DEBT Convertible Note On March 24, 2021, October 1, 2023 April 8, 2021, The Note was a senior, unsecured obligation of the Company, payable at 112% of the principal amount at maturity ( October 1, 2023), 100.6749 $1,000 Beginning on March 1, 2022, first 90% three 3 10 no March 1, 2022, first As of June 22, 2022, The components of the Convertible Note are as follows: December 31, 2022 December 31, 2021 Convertible Note $ - 16,800,000 Less: unamortized debt issuance costs - (2,213,064 ) Convertible Note payable $ - $ 14,586,936 Current portion of Convertible Note payable - 8,400,000 Convertible Note payable, less current portion - 6,186,936 Convertible Note payable $ - $ 14,586,936 For the year ended December 31, 2022 2021, Senior Promissory Notes On June 22, 2022, 21 April 21 April The Notes have a term of 24 months and do not not second Additionally, as part of the transaction, the Company issued 230,000 warrants to the placement agent. All of the warrants issued in this transaction have an exercise price of $0.65 per share, a term of five As a result, the Company recorded an initial debt discount of $695,749, based on the relative fair value of the warrants and notes issued. The Company determined the fair value of the warrants by using the Black-Scholes Option Pricing Model, with the following assumptions: expected term of 2.5 years, stock price of $0.43, exercise price of $0.65, volatility of 80.8%, risk-free rate of 3.13%, and no The components of notes payable are as follows: December 31, 2022 December 31, 2021 Senior Promissory Notes $ 6,000,000 - Less: unamortized debt discount (519,686 ) - Senior Promissory Notes payable $ 5,480,314 $ - Current portion of Senior Promissory Notes payable - - Senior Promissory Notes payable, less current portion 5,480,314 - Senior Promissory Notes payable $ 5,480,314 $ - For the year ended December 31, 2022, 2021,

Note 10 - Agreements, Commitmen

Note 10 - Agreements, Commitments and Contingencies	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 10 AGREEMENTS, COMMITMENTS AND CONTINGENCIES Contingencies -- may In 2022 2019, fourth 2023. Product Warranties one three may In addition, the Company sells an extended warranty for certain systems, which generally provides a warranty for up to four The Company periodically assesses the adequacy of its recorded warranty liabilities and adjusts the amounts, as necessary. Factors that affect the warranty liability include the number of units sold, historical and anticipated rates of warranty claims, and the cost per claim. Changes in the Company's current and long-term warranty obligations included in accrued expenses on the balance sheet for the fiscal years ended December 31, 2022 2021 2022 2021 Balance at January 1, $ 962,313 $ 1,056,613 Warranty costs charged to cost of goods sold 86,256 177,302 Utilization charges against reserve (93,653 ) (191,068 ) Foreign currency effect (56,844 ) (80,534 ) Balance at December 31, $ 898,072 $ 962,313

Note 11 - Income Taxes

Note 11 - Income Taxes	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Income Tax Disclosure [Text Block]	NOTE 11 INCOME TAXES The Company accounts for income taxes in accordance with FASB ASC Topic 740, two first not second 50%. As of December 31, 2022, 2041; not not not 2027. As of December 31, 2022 December 31, 2021, not not December 31, 2022 December 31, 2021 The temporary differences, tax credits and carry forwards gave rise to the following deferred tax assets and liabilities at December 31, 2022 December 31, 2021: 2022 2021 Excess of tax over financial accounting $ 973,859 $ 708,825 Reserve for excess and obsolete inventory 145,910 49,615 Accrued expenses - 4,305 Accrued interest - 13,125 Discount amortization 640,163 175,420 Deferred compensation - 52,500 Net operating loss carryover 11,057,361 9,959,356 Excess of book over tax depreciation (272,243 ) (343,294 ) Excess of book over tax work in progress (253,930 ) (587,469 ) Valuation allowance (12,445,765 ) (10,257,162 ) $ (154,645 ) $ (224,779 ) Distributed as: Long-term deferred tax asset - - Long-term deferred tax liability (154,645 ) (224,779 ) $ (154,645 ) $ (224,779 ) A reconciliation of income tax expense at the federal statutory rate to income tax expense at the Company’s effective rate is as follows for the years ended December 31, 2022 2021: 2022 2021 Computed tax at expected statutory rate $ (3,025,369 ) $ (2,349,899 ) State and local income taxes, net of federal benefit (1,532 ) (1,387 ) Non-US income taxed at different rates (138,596 ) (101,856 ) Deferred compensation 52,500 (31,500 ) Non-deductible expenses 2,749 1,565 Non-taxable income (541 ) - Change in valuation allowance 3,035,205 2,209,294 Other (161,826 ) 210,747 Income tax expense (benefit) $ (237,410 ) $ (63,036 ) The components of income tax expense (benefit) from continuing operations for the years ended December 31, 2022 2021 2022 2021 Current income taxes: Danish $ (181,417 ) $ - Federal - - State - - Current tax (benefit) $ - $ - Deferred income taxes: Book in excess of tax depreciation $ (346,154 ) $ (309,719 ) Work in progress (294,233 ) (174,093 ) Net operating loss carryover (2,041,211 ) (2,667,221 ) Valuation allowance 2,319,705 2,811,619 Deferred compensation (52,500 ) 31,500 Accrued interest (13,125 ) 13,125 Discount amortization 464,744 175,420 Accrued vacation (4,305 ) 4,305 Reserve for obsolete inventory (88,915 ) 52,028 Deferred tax expense (benefit) $ (55,994 ) $ (63,036 ) Total tax expense (benefit) $ (237,410 ) $ (63,036 ) Deferred income tax expense / (benefit) results primarily from the reversal of temporary timing differences between tax and financial statement income. The Company files Danish, Chinese, U.S. federal and Minnesota state income tax returns. LiqTech Holding, LiqTech Ceramics, LiqTech Water, LiqTech Plastics, LiqTech Emission Control, and LiqTech Water Projects are generally no 2017 no 2017

Note 12 - Earnings Per Share

Note 12 - Earnings Per Share	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 12 EARNINGS PER SHARE Basic and diluted net income (loss) per common share is determined by dividing net income (loss) by the weighted average common shares outstanding during the period. For the periods where there is a net loss, stock options, warrants, and Restricted Stock Units have been excluded from the calculation of diluted net loss per common share because their effect would be anti-dilutive. Consequently, the weighted average common shares used to calculate both basic and diluted net loss per common share would be the same. For the year ended December 31, 2022, For the year ended December 31, 2021,

Note 13 - Stockholders' Equity

Note 13 - Stockholders' Equity	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	NOTE 13 Common Stock December 31, 2022 2021, Voting -- one not Dividends -- may may Liquidation Rights -- Other Matters -- no no Preferred Stock -- one may may The Company has 2,500,000 authorized shares of preferred stock, $0.001 par value. As of December 31, 2022 2021, Stock Issuances Since January 1, 2022, On January 3, 2022, 2021. On January 3, 2022, 2021. On May 17, 2022, On May 19, 2022, $26,450,000 On August 25, 2022, On November 29, 2022, 2022. On December 30, 2022, Warrants On August 17, 2021, 500,000 August 17, 2021, On May 17, 2022, $23,000,000 On June 23, 2022, 21 April 21 April five The following is a summary of the periodic changes in warrants outstanding for the years ended December 31, 2022 2021: 2022 2021 Warrants outstanding at January 1 1,015,000 515,000 Warrants issued in connection with public offering and private placement 34,905,000 - Common stock exchanged to prefunded warrant - 500,000 Warrants outstanding at December 31 35,920,000 1,015,000 Stock-based Compensation In 2013, December 31, 2022, three third three In 2022, “2022 2022 December 31, 2022, The Company recognizes compensation costs for RSU grants to directors and management based on the stock price on the date of the grant. The Company recognized stock-based compensation expense related to RSU grants of $934,423 and $481,105 for the years ended December 31, 2022 2021, December 31, 2022, A summary of the status of the RSUs as of December 31, 2022 December 31, 2022 Number of units Weighted Average Grant-Date Fair value Aggregated Intrinsic Value Outstanding, December 31, 2021 149,636 $ 6.59 $ - Granted 2,574,871 0.77 - Vested and settled with share issuance (164,523 ) (3.58 ) - Forfeited (151,093 ) (6.20 ) - Outstanding, December 31, 2022 2,408,892 $ 0.63 $ -

Note 14 - Segment Reporting

Note 14 - Segment Reporting	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 14 SEGMENT REPORTING The Company operates in three January 1, 2020, 2020. Segment information for the business areas is as follows: For the Year Ended December 31, Revenues 2022 2021 Water $ 5,297,286 $ 7,196,465 Ceramics 6,844,861 7,183,868 Plastics 3,528,606 3,615,681 Other 311,685 277,428 Total consolidated revenue $ 15,982,438 $ 18,273,442 For the Year Ended December 31, Loss 2022 2021 Water $ (1,072,530 ) $ (1,411,196 ) Ceramics (4,648,768 ) (3,330,840 ) Plastics (794,942 ) (1,317,293 ) Other (7,652,867 ) (5,067,631 ) Total consolidated Loss $ (14,169,107 ) $ (11,126,960 ) For the Year Ended December 31, Total assets 2022 2021 Water $ 7,781,211 $ 7,767,679 Ceramics 13,808,529 13,961,057 Plastics 1,099,019 1,645,879 Other 17,436,896 21,680,077 Total consolidated assets $ 40,125,655 $ 45,054,692

Note 15 - Significant Customers

Note 15 - Significant Customers / Concentration	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Concentration Risk Disclosure [Text Block]	NOTE 15 SIGNIFICANT CUSTOMERS / CONCENTRATION The following table presents customers accounting for 10% For the Year Ended December 31, 2022 2021 Customer A 13 % - % Customer B - % 12 % Customer C - % 10 % * Zero or less than 10% The following table presents customers accounting for 10% December 31, 2022 December 31, 2021 Customer B - % 16 % Customer C 20 % - % Customer D 17 % - % Customer E 10 % - % Customer F - % 11 % As of December 31, 2022, December 31, 2021,

Note 16 - Subsequent Events

Note 16 - Subsequent Events	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 16 SUBSEQUENT EVENTS On January 3, 2023, 2022. On January 3, 2023, 2022.

Schedule II Valuation and Quali

Schedule II Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2022
Notes to Financial Statements
SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block]	15. Exhibits and Financial Statement Schedules (a) Financial Statements and Schedules The financial statements are set forth under Item 8 December 31, 2022 December 31, 2021 10 a. Valuation and Qualifying Accounts for the years ended December 31, 2022 December 31, 2021. 2022 2021 Bad debt expense (24,534 ) (28,499 ) Reserve for obsolete inventory 404,160 162,651 Balance Beginning of Year Charges to Costs and Expenses Deductions (1) Balance End of Year Year Ended December 31, 2022 Allowance for inventory obsolescence $ 268,470 $ 404,160 $ (9,403 ) $ 663,227 Allowance for doubtful accounts 409,076 (24,534 ) (324,983 ) 59,559 Totals $ 677,546 $ 379,626 $ (334,386 ) $ 722,786 Year Ended December 31, 2021 Allowance for inventory obsolescence $ 723,949 $ 162,651 $ (618,129 ) $ 268,470 Allowance for doubtful accounts 498,044 (28,499 ) (60,469 ) 409,076 Totals $ 1,221,993 $ 134,152 $ (678,598 ) $ 677,546 2022 2021 Allowance for doubtful accounts at the beginning of the period $ 409,076 $ 498,044 Bad debt expense (24,534 ) (28,499 ) Receivables written off during the periods (295,778 ) (24,415 ) Effect of currency translation (29,205 ) (36,054 ) Allowance for doubtful accounts at the end of the period $ 59,559 $ 409,076 ( 1 Schedules other than that listed above are omitted because the conditions requiring their filing do not not not

Significant Accounting Policies

Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2022
Accounting Policies [Abstract]
Basis of Accounting, Policy [Policy Text Block]	Business and Basis of Presentation The consolidated financial statements include the accounts of LiqTech International, Inc. and its subsidiaries (the “Company”). The terms "Company", “us", "we" and "our" as used in this report refer to the Company and its subsidiaries, which are set forth below. The Company engages in the development, design, production, marketing, and sale of automated filtering systems, ceramic silicon carbide liquid applications, and diesel particulate air filters in the United States, Canada, Europe, Asia, and South America. Set forth below is a description of the Company and each of its subsidiaries: LiqTech International, Inc., a Nevada corporation organized in July 2004, LiqTech USA, a Delaware corporation and a 100% owned subsidiary of the Company formed in May 2011. LiqTech Holding A/S (formerly known as LiqTech International A/S), a Danish corporation, incorporated on January 15, 2000 ( LiqTech NA, Inc. (“LiqTech NA”), incorporated in Delaware on July 1, 2005, January 2021, LiqTech Water A/S (formerly known as LiqTech Systems A/S), a Danish Corporation (“LiqTech Water”), incorporated on September 1, 2009, LiqTech Plastics A/S (formerly known as BS Plastic A/S), a Danish Corporation (“LiqTech Plastics”), acquired on September 1, 2019, LiqTech Ceramics A/S, a Danish corporation (“LiqTech Ceramics”), incorporated on December 20, 2019, LiqTech Water Projects A/S, a Danish corporation (“LiqTech Water Projects”), incorporated on July 28, 2020, LiqTech Emission Control A/S, a Danish corporation (“LiqTech Emission Control”), incorporated on March 1, 2021, LiqTech Environment Technologies (China) Co. Ltd. (“LiqTech China”), incorporated on September 23, 2021, LiqTech PTE Ltd (“LiqTech Singapore”), a 95% owned subsidiary of LiqTech Holding, incorporated in Singapore on January 19, 2012.
Consolidation, Policy [Policy Text Block]	Consolidation --
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Functional Currency / Foreign currency translation -- twelve December 31, 2022 2021.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash, Cash Equivalents, and Restricted Cash -- three December 31, 2022, 2021, Accounts held in each U.S. institution are insured by the Federal Deposit Insurance Company (“FDIC”) up to $250,000. December 31, 2022 December 31, 2021,
Accounts Receivable [Policy Text Block]	Accounts Receivable -- The roll-forward of the allowance for doubtful accounts as of December 31, 2022 December 31, 2021 2022 2021 Allowance for doubtful accounts at the beginning of the period $ 409,076 $ 498,044 Bad debt expense (24,534 ) (28,499 ) Receivables written off during the periods (295,778 ) (24,415 ) Effect of currency translation (29,205 ) (36,054 ) Allowance for doubtful accounts at the end of the period $ 59,559 $ 409,076 The receivables written off during the period 2022
Inventory, Policy [Policy Text Block]	Inventory first first 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 for our products.
Receivable [Policy Text Block]	Contracts Assets / Liabilities not Contract assets also include unbilled receivables, which usually comprise the last invoice remaining after the delivery of the water treatment unit, where revenue is recognized at the transfer of control based upon signed acceptance of the unit by the customer. Most commonly, this invoice is sent to the customer at commissioning of the product or no 12
Assets Held for Sale [Policy Text Block]	Assets Held for Sale 1 2 3 4 one 5 6
Lessee, Leases [Policy Text Block]	Leases -- not 12 not not may
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment -- three ten
Goodwill and Intangible Assets, Policy [Policy Text Block]	Goodwill and Intangible Assets -- not Acquired intangible assets with determinable useful lives are amortized on a straight-line or accelerated basis over the estimated periods benefited, ranging from one ten five 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 Goodwill is not
Revenue [Policy Text Block]	Revenue Recognition January 1, 2018, 606, 2015, 2016, 2017 January 1, 2018. The Company sells products throughout the world; sales by geographical region are as follows for the year ended December 31, 2022 2021: % Distribution For the Year Ended December 31 2022 2021 2022 2021 Americas 7 % 17 % $ 1,073,433 $ 3,121,797 Asia-Pacific 21 % 25 % 3,406,420 4,658,070 Europe 59 % 58 % 9,379,337 10,493,575 Middle East & Africa 13 % 0 % 2,123,248 - 100 % 100 % $ 15,982,438 $ 18,273,442 The Company’s sales by product line are as follows for the years ended December 31, 2022 2021: % Distribution For the Year Ended December 31 2022 2021 2022 2021 Water 33 % 39 % $ 5,297,286 $ 7,196,465 Ceramics 43 % 39 % 6,844,861 7,183,868 Plastics 22 % 20 % 3,528,606 3,615,681 Corporate 2 % 2 % 311,685 277,428 100 % 100 % $ 15,982,438 $ 18,273,442 For Water (systems and aftermarket), Ceramics (diesel particulate filters and membranes), and Plastics (components), revenue is recognized when performance obligations specified within the terms of a contract with the customer are satisfied, which occurs when control of the product transfers to the customer or when services are rendered by the Company. The majority of the Company's sales contracts contain performance obligations satisfied at a point in time when title along with risks and rewards of ownership have transferred to the customer. This generally occurs when the product is shipped or accepted by the customer. Revenue for service contracts is recognized as the services are provided. Revenue is measured as the amount of consideration expected to be received in exchange for transferring the goods or providing services. The satisfaction of performance obligations under the terms of a revenue contract generally gives rise to the right to receive payment from the customer. The Company's standard payment terms vary by the type and location of the customer and the products or services offered. Generally, the time between when revenue is recognized and when payment is due is not not For contracts with customers that include multiple performance obligations, judgment is required to determine whether performance obligations specified in these contracts are distinct and should be accounted for as separate revenue transactions for recognition purposes. For such arrangements, revenue is allocated to each performance obligation based on its relative standalone selling price. Standalone selling prices are generally determined based on the prices charged to customers or using expected cost-plus margin. System sales are recognized when the Company transfers control to the customer based upon sales and delivery conditions specified in the sales contract. This typically occurs upon shipment of the system from the production facility but can also occur upon other agreed delivery terms. In connection with the completion of the system, it is normal procedure to issue a FAT (Factory Acceptance Test) asserting that the customer has accepted the performance of the system as it is being shipped from our production facility in Hobro. As part of the performance obligation, the customer is normally offered commissioning services (final assembly and configuration at a place designated by the customer), and this commissioning is therefore considered a second second first Aftermarket sales represent parts, extended warranties, and maintenance services. For the sale of aftermarket parts, the Company transfers control and recognizes revenue when parts are shipped to the customer. When customers are given the right to return eligible parts and accessories, the Company estimates the expected returns based on an analysis of historical experience. The Company adjusts estimated revenues at the earlier of when the most likely amount of consideration expected to be received changes or when the consideration becomes fixed. The Company recognizes revenue for extended warranty and maintenance agreements based on the standalone selling price over the life of the contract. The Company has received long-term contracts for grants from government entities for the development and use of silicon carbide membranes in various water filtration and treatment applications and historically in the installation of various water filtration systems. We measure the transfer of control of the performance obligation on long-term contracts utilizing the cost-to-cost measure of progress, with cost of revenue including direct costs such as labor and materials. Under the cost-to-cost approach, the use of estimated costs to complete each performance obligation is a significant variable in the process of determining recognized revenue and a significant factor in the accounting for such performance obligations. The timing of when we bill our customers is generally dependent upon advance billings terms, milestone billings based on completion of certain phases of the work, or when services are provided or products are shipped. Projects with performance obligations recognized over time that have costs and estimated earnings recognized to date in excess of cumulative billings are reported on our balance sheet as Contract assets. Projects with performance obligations recognized over time that have cumulative billings in excess of costs and estimated earnings recognized to date are reported on our balance sheet as Contract liabilities. The roll-forward of Contract Assets/Liabilities for the year ended December 31, 2022 December 31, 2021 2022 2021 Cost incurred $ 3,860,179 $ 3,381,994 Unbilled project deliveries 950,105 454,158 VAT 229,006 542,255 Other receivables 45,814 60,158 Prepayments (3,363,039 ) (2,947,736 ) Deferred Revenue (118,327 ) (499,146 ) $ 1,603,738 $ 991,682 Distributed as follows: Contract assets $ 2,253,295 $ 1,906,510 Contract liabilities (649,557 ) (914,828 ) $ 1,603,738 $ 991,682
Advertising Cost [Policy Text Block]	Advertising Cost -- December 31, 2022 2021,
Research and Development Expense, Policy [Policy Text Block]	Research and Development Cost -- December 31, 2022 2021
Income Tax, Policy [Policy Text Block]	Income Taxes -- 740:
Earnings Per Share, Policy [Policy Text Block]	Income/(Loss) Per Share -- 260, not
Share-Based Payment Arrangement [Policy Text Block]	Stock Awards -- 718, December 31, 2022 2021,
Fair Value Measurement, Policy [Policy Text Block]	Fair Value of Financial Instruments -- 820. three ● Level 1. ● Level 2. ● Level 3. no 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.
Use of Estimates, Policy [Policy Text Block]	Accounting Estimates --
New Accounting Pronouncements, Policy [Policy Text Block]	Recent Accounting Pronouncements March 2022, 2022 02, 326 January 1, 2023, not In November 2021, 2021 10, 1 2 3 January 1, 2022. not In August 2020, 2020 06 2020 06 no 2020 06 no 2020 06 December 15, 2021, 2020 06 December 15, 2023, no December 15, 2020, 2020 06 January 1, 2022, In March 2020, 2020 4 848 December 31, 2022. not In June 2016, 2016 13, 326 December 15, 2022. not

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Financing Receivable, Allowance for Credit Loss [Table Text Block]	2022 2021 Allowance for doubtful accounts at the beginning of the period $ 409,076 $ 498,044 Bad debt expense (24,534 ) (28,499 ) Receivables written off during the periods (295,778 ) (24,415 ) Effect of currency translation (29,205 ) (36,054 ) Allowance for doubtful accounts at the end of the period $ 59,559 $ 409,076
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	% Distribution For the Year Ended December 31 2022 2021 2022 2021 Americas 7 % 17 % $ 1,073,433 $ 3,121,797 Asia-Pacific 21 % 25 % 3,406,420 4,658,070 Europe 59 % 58 % 9,379,337 10,493,575 Middle East & Africa 13 % 0 % 2,123,248 - 100 % 100 % $ 15,982,438 $ 18,273,442
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	% Distribution For the Year Ended December 31 2022 2021 2022 2021 Water 33 % 39 % $ 5,297,286 $ 7,196,465 Ceramics 43 % 39 % 6,844,861 7,183,868 Plastics 22 % 20 % 3,528,606 3,615,681 Corporate 2 % 2 % 311,685 277,428 100 % 100 % $ 15,982,438 $ 18,273,442
Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]	2022 2021 Cost incurred $ 3,860,179 $ 3,381,994 Unbilled project deliveries 950,105 454,158 VAT 229,006 542,255 Other receivables 45,814 60,158 Prepayments (3,363,039 ) (2,947,736 ) Deferred Revenue (118,327 ) (499,146 ) $ 1,603,738 $ 991,682 Distributed as follows: Contract assets $ 2,253,295 $ 1,906,510 Contract liabilities (649,557 ) (914,828 ) $ 1,603,738 $ 991,682

Note 3 - Restructuring Costs (T

Note 3 - Restructuring Costs (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Restructuring and Related Costs [Table Text Block]	December 31, 2022 CEO separation $ 228,975 Terminated employees 158,199 China close-down 275,445 Capex commitments 813,994 Write-downs 416,553 $ 1,893,166
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]	2022 2021 Restructuring accruals, January 1 $ - $ - Restructuring costs, net 1,893,166 - Cash payments (1,476,613 ) - Asset impairments (416,553 ) - Restructuring accruals, December 31 $ - $ -

Note 4 - Inventory (Tables)

Note 4 - Inventory (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Inventory, Current [Table Text Block]	2022 2021 Furnace parts and supplies $ 66,495 $ 213,224 Raw materials 2,474,227 2,144,067 Work in process 982,973 1,671,290 Finished goods and filtration systems 1,201,533 1,660,916 Reserve for excess and obsolescence (663,227 ) (268,470 ) Net Inventory $ 4,062,001 $ 5,421,027

Note 5 - Property and Equipme_2

Note 5 - Property and Equipment (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Property, Plant and Equipment [Table Text Block]	Useful Life 2022 2021 Production equipment 3 - 10 $ 8,027,589 $ 7,425,145 Production equipment - finance lease 3 - 10 3,625,558 3,066,623 Lab equipment 3 - 10 118,935 117,770 Computer equipment 3 - 5 1,070,437 1,005,223 Vehicles 3 - 5 26,020 90,819 Furniture and fixture 5 1,141,424 1,166,071 Furniture and fixture - finance lease 5 252,397 268,208 Leasehold improvements 5 - 10 3,080,946 3,273,940 17,343,306 16,413,799 Less Accumulated Depreciation (8,501,846 ) (7,218,468 ) Less Accumulated Depreciation - finance lease (544,653 ) (336,338 ) Net Property and Equipment $ 8,296,807 $ 8,858,993

Note 6 - Leases (Tables)

Note 6 - Leases (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Lessee, Operating and Finance Lease, Assets and Liabilities [Table Text Block]	December 31, 2022 December 31, 2021 Operating leases Operating lease right-of-use assets $ 3,271,997 $ 6,925,807 Operating lease liabilities – current $ 561,182 $ 846,544 Operating lease liabilities – long-term 2,710,815 6,154,064 Total operating lease liabilities $ 3,271,997 $ 7,000,608 Finance leases Property and equipment, at cost $ 3,877,955 $ 3,334,830 Accumulated depreciation (544,653 ) (336,337 ) Property and equipment, net $ 3,333,302 $ 2,998,494 Finance lease liabilities – current $ 399,198 $ 373,824 Finance lease liabilities – long-term 2,384,011 2,499,591 Total finance lease liabilities $ 2,783,209 $ 2,873,415 Weighted average remaining lease term: Operating leases 9.6 8.9 Finance leases 5.4 5.9 Weighted average discount rate: Operating leases 6.2 % 6.5 % Finance leases 2.2 % 2.8 %
Maturity of Operating and Finance Lease Liabilities [Table Text Block]	Operating lease Finance lease 2023 $ 745,898 $ 516,175 2024 604,324 517,076 2025 315,007 513,658 2026 304,595 478,441 2027 304,595 1,016,291 Thereafter 2,056,019 190,659 Total payment under lease agreements 4,330,439 3,232,300 Less imputed interest (1,058,442 ) (449,091 ) Total lease liability $ 3,271,997 $ 2,783,209

Note 7 - Intangible Assets (Tab

Note 7 - Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Finite-Lived Intangible Assets [Table Text Block]	2022 2021 Customer relationships $ 473,308 $ 502,957 Patent cost 177,875 189,017 651,183 691,974 Less Accumulated amortization (438,250 ) (357,231 ) Intangible assets, net $ 212,933 $ 334,743
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Year ending December 31, Amortization Expenses 2023 102,077 2024 70,523 2025 7,415 2026 7,415 2027 7,415 Thereafter 18,088 $ 212,933

Note 9 - Long-term Debt (Tables

Note 9 - Long-term Debt (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Convertible Debt [Table Text Block]	December 31, 2022 December 31, 2021 Convertible Note $ - 16,800,000 Less: unamortized debt issuance costs - (2,213,064 ) Convertible Note payable $ - $ 14,586,936 Current portion of Convertible Note payable - 8,400,000 Convertible Note payable, less current portion - 6,186,936 Convertible Note payable $ - $ 14,586,936
Schedule of Debt [Table Text Block]	December 31, 2022 December 31, 2021 Senior Promissory Notes $ 6,000,000 - Less: unamortized debt discount (519,686 ) - Senior Promissory Notes payable $ 5,480,314 $ - Current portion of Senior Promissory Notes payable - - Senior Promissory Notes payable, less current portion 5,480,314 - Senior Promissory Notes payable $ 5,480,314 $ -

Note 10 - Agreements, Commitm_2

Note 10 - Agreements, Commitments and Contingencies (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	2022 2021 Balance at January 1, $ 962,313 $ 1,056,613 Warranty costs charged to cost of goods sold 86,256 177,302 Utilization charges against reserve (93,653 ) (191,068 ) Foreign currency effect (56,844 ) (80,534 ) Balance at December 31, $ 898,072 $ 962,313

Note 11 - Income Taxes (Tables)

Note 11 - Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Deferred Tax Assets and Liabilities [Table Text Block]	2022 2021 Excess of tax over financial accounting $ 973,859 $ 708,825 Reserve for excess and obsolete inventory 145,910 49,615 Accrued expenses - 4,305 Accrued interest - 13,125 Discount amortization 640,163 175,420 Deferred compensation - 52,500 Net operating loss carryover 11,057,361 9,959,356 Excess of book over tax depreciation (272,243 ) (343,294 ) Excess of book over tax work in progress (253,930 ) (587,469 ) Valuation allowance (12,445,765 ) (10,257,162 ) $ (154,645 ) $ (224,779 ) Distributed as: Long-term deferred tax asset - - Long-term deferred tax liability (154,645 ) (224,779 ) $ (154,645 ) $ (224,779 )
Schedule of Effective Income Tax Rate Reconciliation [Table Text Block]	2022 2021 Computed tax at expected statutory rate $ (3,025,369 ) $ (2,349,899 ) State and local income taxes, net of federal benefit (1,532 ) (1,387 ) Non-US income taxed at different rates (138,596 ) (101,856 ) Deferred compensation 52,500 (31,500 ) Non-deductible expenses 2,749 1,565 Non-taxable income (541 ) - Change in valuation allowance 3,035,205 2,209,294 Other (161,826 ) 210,747 Income tax expense (benefit) $ (237,410 ) $ (63,036 )
Schedule of Components of Income Tax Expense (Benefit) [Table Text Block]	2022 2021 Current income taxes: Danish $ (181,417 ) $ - Federal - - State - - Current tax (benefit) $ - $ - Deferred income taxes: Book in excess of tax depreciation $ (346,154 ) $ (309,719 ) Work in progress (294,233 ) (174,093 ) Net operating loss carryover (2,041,211 ) (2,667,221 ) Valuation allowance 2,319,705 2,811,619 Deferred compensation (52,500 ) 31,500 Accrued interest (13,125 ) 13,125 Discount amortization 464,744 175,420 Accrued vacation (4,305 ) 4,305 Reserve for obsolete inventory (88,915 ) 52,028 Deferred tax expense (benefit) $ (55,994 ) $ (63,036 ) Total tax expense (benefit) $ (237,410 ) $ (63,036 )

Note 13 - Stockholders' Equity

Note 13 - Stockholders' Equity (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	2022 2021 Warrants outstanding at January 1 1,015,000 515,000 Warrants issued in connection with public offering and private placement 34,905,000 - Common stock exchanged to prefunded warrant - 500,000 Warrants outstanding at December 31 35,920,000 1,015,000
Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]	December 31, 2022 Number of units Weighted Average Grant-Date Fair value Aggregated Intrinsic Value Outstanding, December 31, 2021 149,636 $ 6.59 $ - Granted 2,574,871 0.77 - Vested and settled with share issuance (164,523 ) (3.58 ) - Forfeited (151,093 ) (6.20 ) - Outstanding, December 31, 2022 2,408,892 $ 0.63 $ -

Note 14 - Segment Reporting (Ta

Note 14 - Segment Reporting (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedule of Segment Reporting Information, by Segment [Table Text Block]	For the Year Ended December 31, Revenues 2022 2021 Water $ 5,297,286 $ 7,196,465 Ceramics 6,844,861 7,183,868 Plastics 3,528,606 3,615,681 Other 311,685 277,428 Total consolidated revenue $ 15,982,438 $ 18,273,442 For the Year Ended December 31, Loss 2022 2021 Water $ (1,072,530 ) $ (1,411,196 ) Ceramics (4,648,768 ) (3,330,840 ) Plastics (794,942 ) (1,317,293 ) Other (7,652,867 ) (5,067,631 ) Total consolidated Loss $ (14,169,107 ) $ (11,126,960 ) For the Year Ended December 31, Total assets 2022 2021 Water $ 7,781,211 $ 7,767,679 Ceramics 13,808,529 13,961,057 Plastics 1,099,019 1,645,879 Other 17,436,896 21,680,077 Total consolidated assets $ 40,125,655 $ 45,054,692

Note 15 - Significant Custome_2

Note 15 - Significant Customers / Concentration (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	For the Year Ended December 31, 2022 2021 Customer A 13 % - % Customer B - % 12 % Customer C - % 10 % December 31, 2022 December 31, 2021 Customer B - % 16 % Customer C 20 % - % Customer D 17 % - % Customer E 10 % - % Customer F - % 11 %

Schedule II Valuation and Qua_2

Schedule II Valuation and Qualifying Accounts (Tables)	12 Months Ended
	Dec. 31, 2022
Notes Tables
Valuation Allowances and Reserves, Bad Debt Expense and Reserve for Obsolete Inventory [Table Text Block]	2022 2021 Bad debt expense (24,534 ) (28,499 ) Reserve for obsolete inventory 404,160 162,651
Valuation Allowances and Reserves [Table Text Block]	Balance Beginning of Year Charges to Costs and Expenses Deductions (1) Balance End of Year Year Ended December 31, 2022 Allowance for inventory obsolescence $ 268,470 $ 404,160 $ (9,403 ) $ 663,227 Allowance for doubtful accounts 409,076 (24,534 ) (324,983 ) 59,559 Totals $ 677,546 $ 379,626 $ (334,386 ) $ 722,786 Year Ended December 31, 2021 Allowance for inventory obsolescence $ 723,949 $ 162,651 $ (618,129 ) $ 268,470 Allowance for doubtful accounts 498,044 (28,499 ) (60,469 ) 409,076 Totals $ 1,221,993 $ 134,152 $ (678,598 ) $ 677,546
Valuation and Qualifying Accounts, Allowance for Credit Loss [Table Text Block]	2022 2021 Allowance for doubtful accounts at the beginning of the period $ 409,076 $ 498,044 Bad debt expense (24,534 ) (28,499 ) Receivables written off during the periods (295,778 ) (24,415 ) Effect of currency translation (29,205 ) (36,054 ) Allowance for doubtful accounts at the end of the period $ 59,559 $ 409,076

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restricted Cash and Cash Equivalents, Current, Total	$ 1,440,394	$ 2,125,695
Cash, Uninsured Amount	12,999,271	11,346,826
Advertising Expense	144,043	308,880
Research and Development Expense, Total	1,835,890	1,862,653
Employees [Member]
Share-Based Payment Arrangement, Expense	$ 934,423	$ 481,105
Customer Relationships [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	5 years
Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Finite-Lived Intangible Asset, Useful Life (Year)	1 year
Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
LiqTech USA [Member] | LiqTech International DK [Member]
Percentage of Subsidiary Owned	100%
LiqTech USA [Member] | LiqTech NA [Member]
Percentage of Subsidiary Owned	100%
LiqTech International DK [Member] | LiqTech PTE [Member]
Percentage of Subsidiary Owned	95%
LiqTech USA [Member]
Noncontrolling Interest, Ownership Percentage by Parent	100%

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Allowance for doubtful accounts	$ 409,076	$ 498,044
Bad debt expense	(24,534)	(28,499)
Receivables written off during the periods	(295,778)	(24,415)
Effect of currency translation	(29,205)	(36,054)
Allowance for doubtful accounts	$ 59,559	$ 409,076

Note 1 - Summary of Significa_5

Note 1 - Summary of Significant Accounting Policies - Net Sales by Geographical Region (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue, Percentage	100%	100%
Revenue	$ 15,982,438	$ 18,273,442
Reportable Geographical Components [Member] | Americas [Member]
Revenue, Percentage	7%	17%
Revenue	$ 1,073,433	$ 3,121,797
Reportable Geographical Components [Member] | Asia Pacific [Member]
Revenue, Percentage	21%	25%
Revenue	$ 3,406,420	$ 4,658,070
Reportable Geographical Components [Member] | Europe [Member]
Revenue, Percentage	59%	58%
Revenue	$ 9,379,337	$ 10,493,575
Reportable Geographical Components [Member] | Middle East and Africa [Member]
Revenue, Percentage	13%	0%
Revenue	$ 2,123,248	$ 0

Note 1 - Summary of Significa_6

Note 1 - Summary of Significant Accounting Policies - Sales by Product Line (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue, Percentage	100%	100%
Revenue	$ 15,982,438	$ 18,273,442
Water Segment [Member]
Revenue, Percentage	33%	39%
Revenue	$ 5,297,286	$ 7,196,465
Ceramics Segment [Member]
Revenue, Percentage	43%	39%
Revenue	$ 6,844,861	$ 7,183,868
Plastics Segment [Member]
Revenue, Percentage	22%	20%
Revenue	$ 3,528,606	$ 3,615,681
Corporate Segment [Member]
Revenue, Percentage	2%	2%
Revenue	$ 311,685	$ 277,428

Note 1 - Summary of Significa_7

Note 1 - Summary of Significant Accounting Policies - Contract Assets and Liabilities (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Cost incurred	$ 3,860,179	$ 3,381,994
Unbilled project deliveries	950,105	454,158
VAT	229,006	542,255
Other receivables	45,814	60,158
Prepayments	(3,363,039)	(2,947,736)
Deferred Revenue	(118,327)	(499,146)
Contract with Customer, Asset (Liability), Net	1,603,738	991,682
Contract assets	2,253,295	1,906,510
Contract liabilities	(649,557)	(914,828)
Contract with Customer, Asset (Liability), Net	$ 1,603,738	$ 991,682

Note 3 - Restructuring Costs (D

Note 3 - Restructuring Costs (Details Textual)			3 Months Ended	6 Months Ended	12 Months Ended
	May 10, 2022 USD ($)	May 10, 2022 DKK (kr)	Jun. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Mar. 31, 2022 USD ($)	Dec. 31, 2020 USD ($)
Restructuring Charges, Total					$ 1,893,166	$ 0
Restructuring Reserve, Ending Balance				$ 0	0	$ 0		$ 0
Capex Commitments [Member]
Other Commitment, Total							$ 10,300,000
CEO Separation [Member]
Restructuring Charges, Total					228,975
Employee Severance [Member]
Restructuring Charges, Total					158,199
Facility Closing [Member]
Restructuring Charges, Total					275,445
Capex Commitments [Member]
Restructuring Charges, Total					813,994
Restructuring Program [Member]
Restructuring Charges, Total			$ 1,893,166
Impairment, Long-Lived Asset, Held-for-Use, Total			240,576
Inventory Write-down			175,977
Restructuring Program [Member] | CEO Separation [Member]
Restructuring Charges, Total	$ 228,975	kr 1,605,000
Restructuring Program [Member] | Employee Severance [Member]
Restructuring Charges, Total			$ 158,199
Restructuring and Related Cost, Percentage Reduction			25%
Restructuring Program [Member] | Facility Closing [Member]
Restructuring Charges, Total			$ 275,445
Restructuring Program [Member] | Capex Commitments [Member]
Restructuring Reserve, Ending Balance			$ 668,606	813,994	$ 813,994
Restructuring Reserve, Accrual Adjustment				$ 145,388

Note 3 - Restructuring Costs -

Note 3 - Restructuring Costs - Restructuring Costs (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restructuring costs	$ 1,893,166	$ 0
CEO Separation [Member]
Restructuring costs	228,975
Employee Severance [Member]
Restructuring costs	158,199
Facility Closing [Member]
Restructuring costs	275,445
Capex Commitments [Member]
Restructuring costs	813,994
Write-down [Member]
Restructuring costs	$ 416,553

Note 3 - Restructuring Costs _2

Note 3 - Restructuring Costs - Roll-forward of Restructuring Accrual (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restructuring accruals, January 1	$ 0	$ 0
Restructuring Charges, Total	1,893,166	0
Cash payments	(1,476,613)	0
Asset impairments	(416,553)	0
Restructuring accruals, December 31	$ 0	$ 0

Note 4 - Inventory - Summary of

Note 4 - Inventory - Summary of Inventory (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Furnace parts and supplies	$ 66,495	$ 213,224
Raw materials	2,474,227	2,144,067
Work in process	982,973	1,671,290
Finished goods and filtration systems	1,201,533	1,660,916
Reserve for excess and obsolescence	(663,227)	(268,470)
Net Inventory	$ 4,062,001	$ 5,421,027

Note 5 - Property and Equipme_3

Note 5 - Property and Equipment (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Depreciation, Total	$ 2,007,112	$ 1,945,489
Cost of Sales [Member]
Depreciation, Total	1,414,514
Operating Expense [Member]
Depreciation, Total	$ 592,598

Note 5 - Property and Equipme_4

Note 5 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Property and equipment, gross	$ 17,343,306	$ 16,413,799
Less Accumulated Depreciation	(9,046,499)	(7,554,803)
Net Property and Equipment	8,296,807	8,858,993
Production Equipment [Member]
Property and equipment, gross	8,027,589	7,425,145
Production Equipment Under Finance Lease [Member]
Property and equipment, gross	3,625,558	3,066,623
Lab Equipment [Member]
Property and equipment, gross	118,935	117,770
Computer Equipment [Member]
Property and equipment, gross	1,070,437	1,005,223
Vehicles [Member]
Property and equipment, gross	$ 26,020	90,819
Furniture and Fixtures [Member]
Useful Life (Year)	5 years
Property and equipment, gross	$ 1,141,424	1,166,071
Furniture and Fixtures Under Finance Lease [Member]
Useful Life (Year)	5 years
Property and equipment, gross	$ 252,397	268,208
Leasehold Improvements [Member]
Property and equipment, gross	3,080,946	3,273,940
Property, Plant and Equipment Not Under Finance Lease [Member]
Less Accumulated Depreciation	(8,501,846)	(7,218,468)
Property, Plant and Equipment Under Finance Lease [Member]
Less Accumulated Depreciation	$ (544,653)	$ (336,338)
Minimum [Member]
Useful Life (Year)	3 years
Minimum [Member] | Production Equipment [Member]
Useful Life (Year)	3 years
Minimum [Member] | Production Equipment Under Finance Lease [Member]
Useful Life (Year)	3 years
Minimum [Member] | Lab Equipment [Member]
Useful Life (Year)	3 years
Minimum [Member] | Computer Equipment [Member]
Useful Life (Year)	3 years
Minimum [Member] | Vehicles [Member]
Useful Life (Year)	3 years
Minimum [Member] | Leasehold Improvements [Member]
Useful Life (Year)	5 years
Maximum [Member]
Useful Life (Year)	10 years
Maximum [Member] | Production Equipment [Member]
Useful Life (Year)	10 years
Maximum [Member] | Production Equipment Under Finance Lease [Member]
Useful Life (Year)	10 years
Maximum [Member] | Lab Equipment [Member]
Useful Life (Year)	10 years
Maximum [Member] | Computer Equipment [Member]
Useful Life (Year)	5 years
Maximum [Member] | Vehicles [Member]
Useful Life (Year)	5 years
Maximum [Member] | Leasehold Improvements [Member]
Useful Life (Year)	10 years

Note 6 - Leases (Details Textua

Note 6 - Leases (Details Textual)	12 Months Ended
	Dec. 31, 2022 USD ($)
Operating Lease, Payments	$ 906,373
Finance Lease, Principal Payments	427,113
Finance Lease Expense	323,081
Other Expense [Member]
Operating Lease, Expense	$ 984,236

Note 6 - Leases - Balance Sheet

Note 6 - Leases - Balance Sheet Information (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Operating lease right-of-use assets	$ 3,271,997	$ 6,925,807
Operating lease liabilities – current	561,182	846,544
Operating lease liabilities – long-term	2,710,815	6,154,064
Total operating lease liability	3,271,997	7,000,608
Property and equipment, at cost	3,877,955	3,334,830
Accumulated depreciation	(544,653)	(336,337)
Finance lease liabilities – current	399,198	373,824
Finance lease liabilities – long-term	2,384,011	2,499,591
Total finance lease liabilities	$ 2,783,209	$ 2,873,415
Operating leases (Year)	9 years 7 months 6 days	8 years 10 months 24 days
Finance leases (Year)	5 years 4 months 24 days	5 years 10 months 24 days
Operating leases	6.20%	6.50%
Finance leases	2.20%	2.80%
Property and equipment, Net [Member]
Property and equipment, net	$ 3,333,302	$ 2,998,494

Note 6 - Leases - Maturities of

Note 6 - Leases - Maturities of Lease Liabilities (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
2023, operating lease	$ 745,898
2023, finance lease	516,175
2024, operating lease	604,324
2024, finance lease	517,076
2025, operating lease	315,007
2025, finance lease	513,658
2026, operating lease	304,595
2026, finance lease	478,441
2027, operating lease	304,595
2027, finance lease	1,016,291
Thereafter, operating lease	2,056,019
Thereafter, finance lease	190,659
Total payment under operating lease agreements	4,330,439
Total payment under lease agreements	3,232,300
Less imputed interest on operating lease	(1,058,442)
Less imputed interest on finance lease	(449,091)
Total operating lease liability	3,271,997	$ 7,000,608
Total finance lease liability	$ 2,783,209	$ 2,873,415

Note 7 - Intangible Assets (Det

Note 7 - Intangible Assets (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Amortization of Intangible Assets	$ 81,019	$ 108,471

Note 7 - Intangible Assets - Sc

Note 7 - Intangible Assets - Schedule of Intangible Assets (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Intangible assets	$ 651,183	$ 691,974
Less Accumulated amortization	(438,250)	(357,231)
Intangible assets, net	212,933	334,743
Customer Relationships [Member]
Intangible assets	473,308	502,957
Patents [Member]
Intangible assets	$ 177,875	$ 189,017

Note 7 - Intangible Assets - Ex

Note 7 - Intangible Assets - Expected Future Amortization Expense (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
2023	$ 102,077
2024	70,523
2025	7,415
2026	7,415
2027	7,415
Thereafter	18,088
Intangible assets, net	$ 212,933	$ 334,743

Note 8 - Lines of Credit (Detai

Note 8 - Lines of Credit (Details Textual) - Dec. 31, 2022	USD ($)	EUR (€)
Line of Credit Facility, Maximum Borrowing Capacity	$ 1,440,000	€ 1,350,000
Guarantor Obligations, Current Carrying Value	$ 281,584

Note 9 - Long-term Debt (Detail

Note 9 - Long-term Debt (Details Textual)				12 Months Ended
	Jun. 22, 2022 USD ($) $ / shares shares	Mar. 01, 2022 USD ($)	Apr. 08, 2021 USD ($) $ / shares shares	Dec. 31, 2022 USD ($) $ / shares	Dec. 31, 2021 USD ($) $ / shares	May 17, 2022 $ / shares
Stock Issued During Period, Shares, Issued for Commitment Fee (in shares) | shares			80,000
Common Stock, Par or Stated Value Per Share (in dollars per share) | $ / shares			$ 0.001	$ 0.001	$ 0.001	$ 0.001
Senior Promissory Notes Warrant [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares	4,250,000
Senior Promissory Notes Placement Agent Warrants [Member]
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares) | shares	230,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share) | $ / shares	$ 0.65
Warrants and Rights Outstanding, Term (Year)	5 years
Senior Promissory Notes [Member]
Debt Instrument, Face Amount	$ 6,000,000			$ 6,000,000	$ 0
Interest Expense, Debt, Total				0	0
Amortization of Debt Issuance Costs				176,063	0
Debt Instrument, Term (Month)	24 months
Debt Instrument, Interest Rate, Stated Percentage	10%
Debt Instrument, Stated Rate, Monthly Increase if Unpaid	1%
Debt Instrument, Unamortized Discount, Total	$ 695,749			519,686	0
Senior Promissory Notes [Member] | Measurement Input, Expected Term [Member]
Debt Instrument, Measurement Input	2.5
Senior Promissory Notes [Member] | Measurement Input, Share Price [Member]
Debt Instrument, Measurement Input	0.43
Senior Promissory Notes [Member] | Measurement Input, Exercise Price [Member]
Debt Instrument, Measurement Input	0.65
Senior Promissory Notes [Member] | Measurement Input, Price Volatility [Member]
Debt Instrument, Measurement Input	0.808
Senior Promissory Notes [Member] | Measurement Input, Risk Free Interest Rate [Member]
Debt Instrument, Measurement Input	0.0313
Senior Promissory Notes [Member] | Measurement Input, Forfeiture Rate [Member]
Debt Instrument, Measurement Input	0
Senior Promissory Notes [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage	16%
Convertible Debt [Member]
Debt Instrument, Face Amount			$ 15,000,000
Debt Instrument, Redemption Price, Percentage			112%
Debt Instrument, Convertible, Conversion Ratio			0.1006749
Debt Instrument, Periodic Payment, Principal		$ 840,000
Debt Instrument, Redemption Covenant, Floor Price (in dollars per share) | $ / shares			$ 1.75
Repayments of Convertible Debt	$ 13,446,875	$ 840,000
Repayments of Convertible Debt, Principal	11,640,000
Repayments of Convertible Debt, Premium	$ 1,806,875
Interest Expense, Debt, Total				308,958	547,917
Amortization of Debt Issuance Costs				$ 2,213,065	$ 835,331

Note 9 - Long-term Debt - Sched

Note 9 - Long-term Debt - Schedule of Convertible Note Payable (Details) - Convertible Debt [Member] - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Convertible Note	$ 0	$ 16,800,000
Less: unamortized debt issuance costs	0	(2,213,064)
Convertible Note payable	0	14,586,936
Current portion of Convertible Note payable	0	8,400,000
Convertible Note payable, less current portion	$ 0	$ 6,186,936

Note 9 - Long-term Debt - Notes

Note 9 - Long-term Debt - Notes Payable (Details) - Senior Promissory Notes [Member] - USD ($)	Dec. 31, 2022	Jun. 22, 2022	Dec. 31, 2021
Senior Promissory Notes	$ 6,000,000	$ 6,000,000	$ 0
Less: unamortized debt discount	(519,686)	$ (695,749)	0
Senior Promissory Notes payable	5,480,314		0
Current portion of Senior Promissory Notes payable	0		0
Senior Promissory Notes payable, less current portion	$ 5,480,314		$ 0

Note 10 - Agreements, Commitm_3

Note 10 - Agreements, Commitments and Contingencies (Details Textual) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022
Minimum [Member]
Standard Product Warranty, Term (Year)		1 year
Maximum [Member]
Standard Product Warranty, Term (Year)		3 years
Extended Product Warranty, Term (Year)		4 years
Arbitration Regarding Marine Waste-Water Treatment System Warranty [Member]
Loss Contingency, Damages Sought, Value	$ 1.5

Note 10 - Agreements and Commit

Note 10 - Agreements and Commitments - Changes in Warranty Obligations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Balance	$ 962,313	$ 1,056,613
Warranty costs charged to cost of goods sold	86,256	177,302
Utilization charges against reserve	(93,653)	(191,068)
Foreign currency effect	(56,844)	(80,534)
Balance	$ 898,072	$ 962,313

Note 11 - Income Taxes (Details

Note 11 - Income Taxes (Details Textual) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets, Valuation Allowance	$ 12,445,765	$ 10,257,162
LiqTech International AS and LiqTech Systems AS [Member]
Deferred Tax Assets, Valuation Allowance	5,226,000	3,506,000
LiqTech Germany [Member]
Deferred Tax Assets, Valuation Allowance	124,000	132,000
LiqTech Singapore [Member]
Deferred Tax Assets, Valuation Allowance	98,000	104,000
LiqTech China [Member]
Deferred Tax Assets, Valuation Allowance	488,000	193,000
LiqTech International Inc and LiqTech NA [Member]
Deferred Tax Assets, Valuation Allowance	6,510,000	5,364,000
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member]
Operating Loss Carryforwards	26,734,381
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 1,146,000	30,000
Domestic Tax Authority [Member] | Internal Revenue Service (IRS) [Member] | Latest Tax Year [Member]
Operating Loss Carryforwards, Expiration Year	2041
Domestic Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 6,000	9,000
Foreign Tax Authority [Member] | Danish Ministry of Taxation [Member]
Operating Loss Carryforwards	20,352,624
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	1,720,000	1,824,000
Foreign Tax Authority [Member] | Federal Ministry of Finance, Germany [Member]
Operating Loss Carryforwards	444,303
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	8,000	11,000
Foreign Tax Authority [Member] | Inland Revenue, Singapore (IRAS) [Member]
Operating Loss Carryforwards	577,266
Foreign Tax Authority [Member] | Chinese Ministry of Taxation [Member]
Operating Loss Carryforwards	1,950,649
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	$ 295,000	$ 193,000

Note 11 - Income Taxes - Deferr

Note 11 - Income Taxes - Deferred Tax Assets (Liabilities) (Details) - USD ($)	Dec. 31, 2022	Dec. 31, 2021
Excess of tax over financial accounting	$ 973,859	$ 708,825
Reserve for excess and obsolete inventory	145,910	49,615
Accrued expenses	0	4,305
Accrued interest	0	13,125
Discount amortization	640,163	175,420
Deferred compensation	0	52,500
Net operating loss carryover	11,057,361	9,959,356
Excess of book over tax depreciation	(272,243)	(343,294)
Excess of book over tax work in progress	(253,930)	(587,469)
Valuation allowance	(12,445,765)	(10,257,162)
Deferred Tax Liabilities, Net, Total	(154,645)	(224,779)
Long-term deferred tax asset	0	0
Long-term deferred tax liability	(154,645)	(224,779)
Deferred Income Tax Liabilities, Net	$ (154,645)	$ (224,779)

Note 11 - Income Taxes - Reconc

Note 11 - Income Taxes - Reconciliation of Income Tax Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Computed tax at expected statutory rate	$ (3,025,369)	$ (2,349,899)
State and local income taxes, net of federal benefit	(1,532)	(1,387)
Non-US income taxed at different rates	(138,596)	(101,856)
Deferred compensation	52,500	(31,500)
Non-deductible expenses	2,749	1,565
Non-taxable income	(541)	0
Change in valuation allowance	3,035,205	2,209,294
Other	(161,826)	210,747
Total tax expense (benefit)	$ (237,410)	$ (63,036)

Note 11 - Income Taxes - Compon

Note 11 - Income Taxes - Components of Income Tax Expense (Benefit) from Continuing Operations (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Current income taxes:
Federal	$ 0	$ 0
State	0	0
Current tax (benefit)	0	0
Book in excess of tax depreciation	(346,154)	(309,719)
Work in progress	(294,233)	(174,093)
Net operating loss carryover	(2,041,211)	(2,667,221)
Valuation allowance	2,319,705	2,811,619
Deferred compensation	(52,500)	31,500
Accrued interest	(13,125)	13,125
Discount amortization	464,744	175,420
Accrued vacation	(4,305)	4,305
Reserve for obsolete inventory	(88,915)	52,028
Deferred tax expense (benefit)	(55,994)	(63,036)
Total tax expense (benefit)	(237,410)	(63,036)
Danish Ministry of Taxation [Member]
Current income taxes:
Danish	$ (181,417)	$ 0

Note 12 - Earnings Per Share (D

Note 12 - Earnings Per Share (Details Textual) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Restricted Stock Units (RSUs) [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	2,408,892	149,636
Prefunded Warrants [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	31,440,000	1,015,000
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount (in shares)	4,480,000

Note 13 - Stockholders' Equit_2

Note 13 - Stockholders' Equity (Details Textual) - USD ($)									9 Months Ended	12 Months Ended
	Dec. 30, 2022	Nov. 29, 2022	Aug. 25, 2022	Jun. 23, 2022	May 19, 2022	May 17, 2022	Jan. 03, 2022	Aug. 17, 2021	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2013	Apr. 08, 2021	Dec. 31, 2020
Common Stock, Shares Authorized (in shares)										100,000,000	100,000,000
Common Stock, Par or Stated Value Per Share (in dollars per share)						$ 0.001				$ 0.001	$ 0.001		$ 0.001
Common Stock, Shares, Issued (in shares)										43,986,079	21,285,706
Preferred Stock, Shares Authorized (in shares)										2,500,000	2,500,000
Preferred Stock, Par or Stated Value Per Share (in dollars per share)										$ 0.001	$ 0.001
Preferred Stock, Shares Issued (in shares)										0	0
Proceeds from Issuance or Sale of Equity, Total					$ 26,450,000
Class of Warrant or Right, Outstanding (in shares)										35,920,000	1,015,000			515,000
Stock Issued During Period, Value, New Issues										$ 24,453,528
Payments of Stock Issuance Costs					$ 1,996,469
Stock Issued During Period, Shares, Restricted Stock Award, Net of Forfeitures, Total (in shares)	80,000	9,208	8,333
Class of Warrant or Right, Issued by Exchange, Shares (in shares)								500,000		0	500,000
Shares Issued, Price Per Share (in dollars per share)										$ 0.50
Class of Warrant or Right, Issued During Period (in shares)										34,905,000	0
Common Stock, Shares, Outstanding, Ending Balance (in shares)										43,986,079	21,285,706
Preferred Stock, Shares Outstanding, Ending Balance (in shares)										0	0
Restricted Stock Units (RSUs) [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)									2,408,892	1,387,347	149,636
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									2,574,871
Share-Based Payment Arrangement, Expense										$ 934,423	$ 481,105
Share-Based Payment Arrangement, Nonvested Award, Excluding Option, Cost Not yet Recognized, Amount										$ 639,129
Restricted Stock Units (RSUs) [Member] | The 2022 Incentive Plan [Member]
Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number, Ending Balance (in shares)										1,021,545
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)										1,021,545
Prefunded Warrants [Member]
Class of Warrant or Right, Outstanding (in shares)						30,425,000
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)								$ 0.001
Warrant Purchase Agreement [Member]
Proceeds from Issuance or Sale of Equity, Total						$ 15,182,075
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)						$ 0.499
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)						30,425,000
Private Placement Warrants [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights (in dollars per share)				$ 0.65
Class of Warrant or Right, Number of Securities Called by Warrants or Rights (in shares)				4,250,000
Public Offering [Member]
Stock Issued During Period, Shares, New Issues (in shares)						15,635,850
Proceeds from Issuance or Sale of Equity, Total						$ 23,000,000
Shares Issued, Price Per Share (in dollars per share)						$ 0.50
Over-Allotment Option [Member]
Stock Issued During Period, Shares, New Issues (in shares)					6,900,000
Stock Issued During Period, Value, New Issues					$ 3,450,000
Private Placement [Member]
Proceeds from Issuance of Debt				$ 6,000,000
Placement Agent Warrants [Member]
Class of Warrant or Right, Issued During Period (in shares)				230,000
Director [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)							18,641
Director [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)												25,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)												3 years
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant												$ 36,750
Management [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)							48,341
Management [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period (in shares)									625,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period (Year)									3 years
Board of Directors Chairman [Member] | Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Annual Grant												$ 73,500
Convertible Preferred Stock [Member]
Preferred Stock, Shares Issued (in shares)										0	0
Preferred Stock, Shares Outstanding, Ending Balance (in shares)										0	0

Note 13 - Stockholders' Equit_3

Note 13 - Stockholders' Equity - Warrants (Details) - shares		12 Months Ended
	Aug. 17, 2021	Dec. 31, 2022	Dec. 31, 2021
Balance, Warrants (in shares)		1,015,000	515,000
Warrants issued in connection with public offering and private placement (in shares)		34,905,000	0
Common stock exchanged to prefunded warrant (in shares)	500,000	0	500,000
Balance, Warrants (in shares)		35,920,000	1,015,000

Note 13 - Stockholders' Equit_4

Note 13 - Stockholders' Equity - Share Incentive Plan Activity (Details) - Restricted Stock Units (RSUs) [Member] - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2022	Dec. 31, 2022	Dec. 31, 2021
Outstanding, units (in shares)	149,636	149,636
Outstanding, weighted average grant-date fair value (in dollars per share)	$ 6.59	$ 6.59
Outstanding, aggregated intrinsic value	$ 0		$ 0
Granted, units (in shares)	2,574,871
Granted, weighted average grant-date fair value (in dollars per share)	$ 0.77
Vested and settled with share issuance, units (in shares)	(164,523)
Vested and settled with share issuance, weighted average grant-date fair value (in dollars per share)	$ (3.58)
Forfeited, units (in shares)	(151,093)
Forfeited, weighted average grant-date fair value (in dollars per share)	$ (6.20)
Outstanding, December 31, 2022 (in shares)	2,408,892	1,387,347
Outstanding, December 31, 2022 (in dollars per share)	$ 0.63

Note 14 - Segment Reporting - S

Note 14 - Segment Reporting - Summary of Segment Activity (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Sep. 30, 2022
Revenue	$ 15,982,438	$ 18,273,442
Net Income (Loss)	(14,169,107)	(11,126,960)
Segment assets	40,125,655	45,054,692	$ 40,125,655
Water Segment [Member]
Revenue	5,297,286	7,196,465
Net Income (Loss)	(1,072,530)	(1,411,196)
Segment assets		7,767,679	7,781,211
Water Segment [Member] | Operating Segments [Member]
Revenue	5,297,286	7,196,465
Ceramics Segment [Member]
Revenue	6,844,861	7,183,868
Net Income (Loss)	(4,648,768)	(3,330,840)
Segment assets		13,961,057	13,808,529
Ceramics Segment [Member] | Operating Segments [Member]
Revenue	6,844,861	7,183,868
Plastics Segment [Member]
Revenue	3,528,606	3,615,681
Plastics Segment [Member] | Operating Segments [Member]
Revenue	3,528,606	3,615,681
Plastic Products [Member]
Net Income (Loss)	(794,942)	(1,317,293)
Segment assets		1,645,879	1,099,019
Other Segments [Member]
Net Income (Loss)	(7,652,867)	(5,067,631)
Segment assets		21,680,077	$ 17,436,896
Other Segments [Member] | Operating Segments [Member]
Revenue	$ 311,685	$ 277,428

Note 15 - Significant Custome_3

Note 15 - Significant Customers / Concentration (Details Textual) - Geographic Concentration Risk [Member] - Assets, Total [Member]	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
DENMARK
Concentration Risk, Percentage	65%	61%
UNITED STATES
Concentration Risk, Percentage	33%	26%
CHINA
Concentration Risk, Percentage	2%	13%

Note 15 - Significant Custome_4

Note 15 - Significant Customers / Concentration / Disaggregated Revenue - Concentration of Risk (Details) - Customer Concentration Risk [Member]	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Revenue Benchmark [Member] | Customer A [Member]
Concentration Risk, Percentage	13%	0%
Revenue Benchmark [Member] | Customer B [Member]
Concentration Risk, Percentage	0%	12%
Revenue Benchmark [Member] | Customer C [Member]
Concentration Risk, Percentage	0%	10%
Accounts Receivable [Member] | Customer B [Member]
Concentration Risk, Percentage	0%	16%
Accounts Receivable [Member] | Customer C [Member]
Concentration Risk, Percentage	20%	0%
Accounts Receivable [Member] | Customer D [Member]
Concentration Risk, Percentage	17%	0%
Accounts Receivable [Member] | Customer E [Member]
Concentration Risk, Percentage	10%	0%
Accounts Receivable [Member] | Customer F [Member]
Concentration Risk, Percentage	0%	11%

Note 16 - Subsequent Events (De

Note 16 - Subsequent Events (Details Textual) - USD ($)	Jan. 03, 2023	Jan. 03, 2022
Management [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)		48,341
Subsequent Event [Member] | Board of Directors Chairman [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)	18,719
Stock Issued During Period, Value, Issued for Services	$ 110,250
Subsequent Event [Member] | Management [Member]
Stock Issued During Period, Shares, Issued for Services (in shares)	1,266,643
Stock Issued During Period, Value, Issued for Services	$ 674,164

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts - Bad Debt Expense and Reserves for Obsolete Inventory (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Bad debt expense	$ (24,534)	$ (28,499)
SEC Schedule, 12-09, Reserve, Inventory [Member]
Bad debt expense	(24,534)	(28,499)
Inventory Write-down	$ 404,160	$ 162,651

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts - Valuation and Qualifying Accounts (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021
Balance Beginning of Year		$ 677,546	$ 1,221,993
Charges to Costs and Expenses		379,626	134,152
Deductions	[1]	(334,386)	(678,598)
Balance End of Year		722,786	677,546
SEC Schedule, 12-09, Reserve, Inventory [Member]
Balance Beginning of Year		268,470	723,949
Charges to Costs and Expenses		404,160	162,651
Deductions	[1]	(9,403)	(618,129)
Balance End of Year		663,227	268,470
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Balance Beginning of Year		409,076	498,044
Charges to Costs and Expenses		(24,534)	(28,499)
Deductions	[1]	(324,983)	(60,469)
Balance End of Year		$ 59,559	$ 409,076
[1]Includes write-offs, the impact of foreign currency exchange rates.

Schedule II - Valuation and Q_3

Schedule II - Valuation and Qualifying Accounts - Rollforward for Allowance for Doubtful Accounts (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Allowance for doubtful accounts	$ 409,076	$ 498,044
Bad debt expense	(24,534)	(28,499)
Receivables written off during the periods	(295,778)	(24,415)
Effect of currency translation	(29,205)	(36,054)
Allowance for doubtful accounts	59,559	409,076
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
Allowance for doubtful accounts	409,076	498,044
Bad debt expense	(24,534)	(28,499)
Receivables written off during the periods	(295,778)	(24,415)
Effect of currency translation	(29,205)	(36,054)
Allowance for doubtful accounts	$ 59,559	$ 409,076