LiqTech International (LIQT) 10-Q 14 Nov 19 2019 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended
	Sep. 30, 2019	Nov. 14, 2019
Document Information [Line Items]
Entity Registrant Name	LIQTECH INTERNATIONAL INC
Entity Central Index Key	0001307579
Trading Symbol	liqt
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Current Reporting Status	Yes
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Common Stock, Shares Outstanding (in shares)		20,547,668
Entity Shell Company	false
Document Type	10-Q
Document Period End Date	Sep. 30, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	Q3
Amendment Flag	false
Title of 12(b) Security	Common Stock, $0.001 par value

Condensed Consolidated Balance

Condensed Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Current Assets:
Cash	$ 9,957,472	$ 3,776,111
Restricted Cash	1,678,936	0
Accounts receivable, net	6,560,857	1,308,122
Other receivables	3,697,315	1,098,796
Contract assets	641,356	624,275
Inventories, net	5,186,234	4,432,055
Prepaid expenses	203,024	133,847
Total Current Assets	27,925,194	11,373,206
Long-Term Assets:
Property and Equipment, net	2,783,420	1,431,649
Operating lease right-of-use asset	2,200,130
Construction in progress	2,138,406
Investments at cost	5,433	5,714
Other intangible assets		748
Deposits	475,769	347,932
Goodwill	605,313
Total Long-Term Assets	8,208,471	1,786,043
Total Assets	36,133,665	13,159,249
Current Liabilities:
Current portion of capital lease obligations		13,789
Current maturities of operating lease liabilities	681,481
Current portion of contingent earn-out	291,690
Accounts payable	3,703,850	2,122,479
Accrued expenses	3,623,012	1,868,229
Contract liabilities	1,165,684	516,335
Income taxes payable	31,260
Deferred revenue	842,254	98,781
Total Current Liabilities	10,339,231	4,619,613
Net deferred income tax liability	210,393
Contingent earn-out, net of current portion	583,380
Operating lease liabilities, net of current maturities	1,561,076
Total Long-term Liabilities	2,354,849
Total Liabilities	12,694,080	4,619,613
Commitment and Contingencies
Stockholders' Equity:
Preferred stock; par value $0.001, 2,500,000 shares authorized; no shares issued or outstanding at September 30, 2019 and December 31, 2018 respectively
Common stock; par value $0.001, 25,000,000 shares authorized, 20,547,668 and 18,228,887 (each after the 4-to-1 reverse stock split) shares issued and outstanding at September 30, 2019 and December 31, 2018, respectively	20,548	18,229
Additional paid-in capital	61,483,032	46,575,986
Accumulated deficit	(31,448,837)	(32,286,224)
Deferred compensation	(23,332)	(23,499)
Accumulated other comprehensive loss	(6,591,826)	(5,744,856)
Total Stockholders' Equity	23,439,585	8,539,636
Total Liabilities and Stockholders' Equity	$ 36,133,665	$ 13,159,249

Condensed Consolidated Balanc_2

Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals)	9 Months Ended	12 Months Ended
	Sep. 30, 2019$ / sharesshares	Dec. 31, 2018$ / sharesshares
Preferred stock, par value (in dollars per share) | $ / shares	$ 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, shares outstanding (in shares)	0	0
Common stock, par value (in dollars per share) | $ / shares	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	25,000,000	25,000,000
Common stock, shares issued (in shares)	20,547,668	18,228,887
Common stock, shares outstanding (in shares)	20,547,668	18,228,887
Common stock, reverse stock split 4-to-1	4	4

Condensed Consolidated Statemen

Condensed Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Sales	$ 9,672,716	$ 3,347,204	$ 26,391,100	$ 9,336,614
Cost of Goods Sold	7,444,978	3,058,465	20,613,172	8,447,645
Gross Profit	2,227,738	288,739	5,777,928	888,969
Operating Expenses:
Selling expenses	461,010	414,504	1,458,633	1,288,294
General and administrative expenses	1,318,505	663,547	3,057,807	2,008,194
Research and development expenses	189,216	152,849	591,572	498,526
Total Operating Expense	1,968,731	1,230,900	5,108,012	3,795,014
Income (Loss) from Operations	259,007	(942,161)	669,916	(2,906,045)
Other Income (Expense)
Interest and other income	28,736	1,814	54,186	12,271
Interest expense	(35,292)	(5,463)	(110,442)	(65,937)
Gain (Loss) on currency transactions	403,432	23,861	244,872	240,947
Gain (Loss) on sale of fixed assets	474		(21,145)
Total Other Income (Expense)	397,350	20,212	167,471	187,281
Income (Loss) Before Income Taxes	656,357	(921,949)	837,387	(2,718,764)
Income Tax Expense (Income)
Net Income (Loss)	$ 656,357	$ (921,949)	$ 837,387	$ (2,718,764)
Basic and Diluted Income (Loss) Per Share (in dollars per share)	$ 0.03	$ (0.05)	$ 0.04	$ (0.18)
Basic Weighted Average Common Shares Outstanding (in shares)	20,547,667	18,185,137	19,350,533	15,199,809
Diluted Weighted Average Common Shares Outstanding (in shares)	20,563,540	18,185,137	19,366,545	15,199,809

Condensed Consolidated Statem_2

Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss)	$ 656,357	$ (921,949)	$ 837,387	$ (2,718,764)
Currency Translation	(1,014,265)	(63,279)	(846,970)	(521,839)
Total Comprehensive Loss	$ (357,908)	$ (985,228)	$ (9,583)	$ (3,240,603)

Condensed Consolidated Statem_3

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) - USD ($)	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Deferred Compensation, Share-based Payments [Member]	Total
BALANCE (in shares) at Dec. 31, 2017	2,200,837	11,107,316
BALANCE at Dec. 31, 2017	$ 2,201	$ 11,108	$ 40,491,229	$ (28,471,696)	$ (5,040,792)	$ (79,933)
Stock based compensation expenses recognized						18,273
Common shares issued, for services provided (in shares)		14,852
Common shares issued, for services provided		$ 14	59,986
Currency translation, net					174,867
Net Income (Loss)				(1,533,287)
BALANCE (in shares) at Mar. 31, 2018	2,200,837	11,122,168
BALANCE at Mar. 31, 2018	$ 2,201	$ 11,123	40,551,214	(30,004,983)	(4,865,925)	(61,660)
BALANCE (in shares) at Dec. 31, 2017	2,200,837	11,107,316
BALANCE at Dec. 31, 2017	$ 2,201	$ 11,108	40,491,229	(28,471,696)	(5,040,792)	(79,933)
Currency translation, net							$ (521,839)
Net Income (Loss)							(2,718,764)
BALANCE (in shares) at Sep. 30, 2018		18,185,137
BALANCE at Sep. 30, 2018		$ 18,185	46,411,430	(31,190,458)	(5,562,631)	(46,666)
BALANCE (in shares) at Mar. 31, 2018	2,200,837	11,122,168
BALANCE at Mar. 31, 2018	$ 2,201	$ 11,123	40,551,214	(30,004,983)	(4,865,925)	(61,660)
Stock based compensation expenses recognized						9,161
Currency translation, net					(633,427)
Net Income (Loss)				(263,526)
Common shares issued, net offering cost (in shares)		4,862,132
Common shares issued, net offering cost		$ 4,862	5,860,215
Net additional offering cost of $73,184, for capital raise in May 2019			(1,390,262)
Conversion of mandatory preferred stock issued (in shares)	(2,200,837)	2,200,837
Conversion of mandatory preferred stock issued	$ (2,201)	$ 2,201
BALANCE (in shares) at Jun. 30, 2018		18,185,137
BALANCE at Jun. 30, 2018		$ 18,185	46,411,430	(30,268,509)	(5,499,352)	(52,499)
Stock based compensation expenses recognized						5,833
Currency translation, net					(63,279)		(63,279)
Net Income (Loss)				(921,949)			$ (921,949)
BALANCE (in shares) at Sep. 30, 2018		18,185,137
BALANCE at Sep. 30, 2018		$ 18,185	46,411,430	(31,190,458)	(5,562,631)	(46,666)
BALANCE (in shares) at Dec. 31, 2018		18,228,887
BALANCE at Dec. 31, 2018		$ 18,229	46,575,986	(32,286,224)	(5,744,856)	(23,499)
Stock based compensation expenses recognized			5,778			10,166
Common shares issued, for services provided (in shares)		28,993
Common shares issued, for services provided		$ 29	134,138			(21,667)
Exercise of stock options (in shares)		45,000
Exercise of stock options		$ 45	133,155
Currency translation, net					(213,922)
Net Income (Loss)				34,244
BALANCE (in shares) at Mar. 31, 2019		18,302,880
BALANCE at Mar. 31, 2019		$ 18,303	46,849,057	(32,251,980)	(5,958,778)	(35,000)
BALANCE (in shares) at Dec. 31, 2018		18,228,887
BALANCE at Dec. 31, 2018		$ 18,229	46,575,986	(32,286,224)	(5,744,856)	(23,499)
Exercise of stock options (in shares)							45,000
Currency translation, net							$ (846,970)
Net Income (Loss)							837,387
BALANCE (in shares) at Sep. 30, 2019		20,547,668
BALANCE at Sep. 30, 2019		$ 20,548	61,483,032	(31,448,837)	(6,591,826)	(23,332)
BALANCE (in shares) at Mar. 31, 2019		18,302,880
BALANCE at Mar. 31, 2019		$ 18,303	46,849,057	(32,251,980)	(5,958,778)	(35,000)
Stock based compensation expenses recognized			17,333			5,834
Currency translation, net					381,217
Net Income (Loss)				146,786
Exercise of warrants (in shares)		28,887
Exercise of warrants		$ 29	(29)
Common shares issued, net offering cost (in shares)		2,215,862
Common shares issued, net offering cost		$ 2,216	14,672,522
Net additional offering cost of $73,184, for capital raise in May 2019			(747,423)
BALANCE (in shares) at Jun. 30, 2019		20,547,668
BALANCE at Jun. 30, 2019		$ 20,548	61,538,883	(32,105,194)	(5,577,561)	(29,166)
Stock based compensation expenses recognized			17,333			5,834
Currency translation, net					(1,014,265)		(1,014,265)
Net Income (Loss)				656,357			$ 656,357
Net additional offering cost of $73,184, for capital raise in May 2019			(73,184)
BALANCE (in shares) at Sep. 30, 2019		20,547,668
BALANCE at Sep. 30, 2019		$ 20,548	$ 61,483,032	$ (31,448,837)	$ (6,591,826)	$ (23,332)

Condensed Consolidated Statem_4

Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (Parentheticals) - USD ($)	3 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Mar. 31, 2019	Mar. 31, 2018
Common Stock [Member]
Shares issued, price per share (in dollars per share)	$ 7.25	$ 1.36	$ 4.63	$ 4.04
Convertible Preferred shares, convertible securities (in shares)		4
Additional Paid-in Capital [Member]
Shares issued, offering cost	$ 747,423	$ 1,390,262

Condensed Consolidated Statem_5

Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Cash Flows from Operating Activities:
Net Income (Loss)	$ 837,387	$ (2,718,764)
Adjustments to reconcile net loss to net cash provided (used) by operations:
Depreciation and amortization	852,705	621,460
Stock-based compensation	174,778	93,267
Changes in assets and liabilities:
Accounts receivable	(4,652,294)	(1,369,207)
Other receivables	(2,593,412)
Inventory	(430,776)	290,567
Construction in progress	(2,138,406)
Prepaid expenses and deposits	(104,928)	(47,243)
Account payable	1,481,881	(301,016)
Accrued expenses	1,769,893	(326,932)
Operating lease liability	(347,747)
Contract assets and liabilities, net	632,268	(80,338)
Total Adjustments	(5,356,038)	(1,119,442)
Net Cash Used in Operating Activities	(4,518,651)	(3,838,206)
Cash Flows from Investing Activities:
Purchase of property and equipment	(510,403)	(145,984)
Proceeds from sale/recovery of property and equipment	23,700
Net cash paid for acquisition	(1,154,902)
Net Cash Used in Investing Activities	(1,641,605)	(145,984)
Cash Flows from Financing Activities:
Net proceeds/payments on capital lease obligation	(13,789)	48,127
Proceeds from exercise of stock options	133,200
Proceeds from issuance of common stocks, net	14,601,554	5,865,077
Net Cash Provided by Financing Activities	14,720,965	5,913,204
Gain (Loss) on Currency Translation	(700,412)	(553,618)
Net Change in Cash, Cash Equivalents and Restricted Cash	7,860,297	1,375,396
Cash, Cash Equivalents and Restricted Cash at Beginning of Period	3,776,111	2,486,199
Cash, Cash Equivalents and Restricted Cash at End of Period	11,636,408	3,861,595
Supplemental Disclosures of Cash Flow Information:
Interest Paid	4,909	54,655
Income Taxes
Supplemental Disclosures of Non-Cash Investing and Financing:
Common stock issued for conversion of mandatory preferred stock		8,803
Offering costs for common stocks issuance	$ 1,463,446	$ 747,423

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	9 Months Ended
	Sep. 30, 2019
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., the “Company” and its subsidiaries. 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 and diesel particulate air filters in 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% May 2011. LiqTech International A/S, a Danish corporation, incorporated on January 15, 2000 ( 100% LiqTech NA, Inc. (“LiqTech NA”), incorporated in Delaware on July 1, 2005, 100% LiqTech Systems A/S, a Danish Corporation ("LiqTech Systems") was incorporated on September 1, 2009 BS Plastic A/S, a Danish Corporation ("BS Plastic") was acquired on September 1, 2019 LiqTech Germany (“LiqTech Germany”), a 100% December 9, 2011, 2019. LiqTech PTE Ltd (“LiqTech Sing”), a 95% January 19, 2012, 2019. Consolidation -- Functional Currency / Foreign currency translation -- nine September 30, 2019 2018. Cash, Cash Equivalents and Restricted Cash -- three September 30, 2019 2018, $1,678,936 $0, no September 30, 2019 December 31, 2018. Accounts Receivable -- The roll forward of the allowance for doubtful accounts for the nine September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 Allowance for doubtful accounts at the beginning of the period $ 971,772 $ 660,581 Addition from acquisition 21,895 - Bad debt expense 3,763 353,562 Receivables written off during the periods (3,494 ) - Effect of currency translation (48,057 ) (42,371 ) Allowance for doubtful accounts at the end of the period $ 945,879 $ 971,772 Inventory -- first first Leases -- In February 2016, No. 2016 02, 842” On January 1, 2019, 842 not 12 not not may $2.1 $2.1 842 not Property and Equipment -- three ten Long-Term Investments -- may may not may Intangible Assets -- 350, two ten Revenue Recognition and Sales Incentives Accounting policy January 1, 2018, 606, 2015, 2016 2017 January 1, 2018. not For membrane and DPF product sales, revenue is recognized when performance obligations under the terms of a contract with the customer are satisfied, which occurs when control of the membrane, DPF or services are transferred to the customer. The majority of the Company's sales contracts contain performance obligations satisfied at a point in time when title and 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 are 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 for 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 based upon signed acceptance of the system by the customer upon shipment of the system based on the terms of the contract. For the majority of systems, the Company transfers control and recognizes revenue when products are shipped to the customer according to the terms of the contract or purchase order. In connection with the system it is normal procedure to issue a FAT (Factory Acceptance Test) stating that the customer has accepted the performance of the system as it is being shipped from the 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 warranty and maintenance services. For the sale of aftermarket parts, the Company transfers control and recognizes revenue when parts are shipped to the customer or services are provided. 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. For invoicing to customers where the transfer of control has not 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 filtrations systems. We measure 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 sheets 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 sheets as Contract liabilities. In Denmark, Value Added Tax (“VAT”) of 25% not The Company’s disaggregated revenue is reported in Note 8. Advertising Cost -- $8,280 $21,693 three $80,630 $25,018 nine September 30, 2019 2018, Research and Development Cost -- $189,216 $152,849 three $591,572 $498,526, nine September 30, 2019 2018 Income Taxes -- 740 Income (Loss) Per Share -- 260, not Stock Options and Awards -- 7 718, $23,167 $5,833 three $174,778 $93,267 nine September 30, 2019 2018, 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, prepaid expenses, investments, accounts payable, accrued expenses, capital lease obligations and notes payable approximates their recorded values due to their short-term maturities. Accounting Estimates -- Recent Accounting Pronouncements June 2018, No. 2018 07, 718” 718 first 2019, not In August 2018, 2018 15 2018 15” Intangibles - Goodwill and Other - Internal-Use Software (Topic 350 40 2018 15 December 15, 2019 In August 2018, No. 2018 13, 820 December 15, 2019, In August 2018, No. 33 10532, 10 November 5, 2018. first 10 first 2019 In February 2016, No. 2016 02, 842 842" one 842 January 1, 2019 not $2.1 $2.1 one 842 not 4 In November 2016, No. 2016 18, September 30, 2019 $1,678,936 $9,957,472 $11,636,408 December 31, 2018 $0 $3,776,111 Other recent accounting pronouncements issued by the FASB did not not

Note 2 - Inventory

Note 2 - Inventory	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE 2 Inventory consisted of the following at September 30, 2019 December 31, 2018: 2019 2018 Furnace parts and supplies $ 611,911 $ 596,806 Raw materials 2,101,188 1,659,826 Work in process 1,644,988 1,691,175 Finished goods and filtration systems 1,608,185 1,596,042 Reserve for obsolescence (780,038 ) (1,111,794 ) Net Inventory $ 5,186,234 $ 4,432,055

Note 3 - Lines of Credit

Note 3 - Lines of Credit	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 3 In connection with certain orders, we have to provide the customer with a working guarantee or a prepayment guarantee or security bond. For that purpose, we have a guaranteed credit line of DKK 94,620 $13,800 September 30, 2019) September 30, 2018, 94,620 $14,690

Note 4 - Leases

Note 4 - Leases	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Lessee, Operating and Finance Leases [Text Block]	NOTE 4 The Company leases certain vehicles, real property 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 Copenhagen and White Bear Lake, Minnesota. On January 1, 2019, 842 2018, Supplemental balance sheet information related to leases as of September 30, 2019 2018 September 30, 2019 December 31, 2018 Operating leases Operating lease right-of-use $ 2,200,130 $ - Operating lease liabilities – current $ 681,481 $ - Operating lease liabilities – long-term 1,561,076 - Total operating lease liabilities $ 2,242,557 $ - Finance leases Property and equipment, at cost $ 1,115,891 $ 1,171,295 Accumulated depreciation (1,115,891 ) (1,162,256 ) Property and equipment, net $ - $ 9,039 Finance lease liabilities – current $ - $ 13,789 Finance lease liabilities – long-term - - Total finance lease liabilities $ - $ 13,789 Weighted average remaining lease term: Operating leases 4.3 - Finance lease - 0.8 Weighted average discount rate: Operating leases 6.9 % - Finance leases - % 7.3 % Maturities of lease liabilities at September 30, 2019 Operating lease Finance lease October 2019 – September 2020 $ 711,058 $ - October 2020 – September 2021 574,753 - October 2021 – September 2022 468,283 - October 2022 – September 2023 433,132 - October 2023 – September 2024 357,179 - Thereafter - - Total payment under lease agreements 2,544,405 - Less imputed interest (301,848 ) - Total lease liability $ 2,242,557 $ - As previously disclosed in our 2018 10 842, December 31, 2018 Year ending December 31, Operating lease 2019 $ 712,250 2020 578,997 2021 402,584 2022 350,249 Thereafter 560,977 Total $ 2,605,057

Note 5 - Agreements and Commitm

Note 5 - Agreements and Commitments	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 5 401 401 three September 30, 2019 2018, $3,007 $2,569, nine September 30, 2019 2018, $8,684 $8,275, Contingencies may On November 20, 2018 DKK448,500 $68,800 2016 not No September 30, 2019 not On February 27, 2019, DKK543,905 $83,400 2017. 2018. no September 30, 2019. In connection with certain orders, we have to provide the customer with a working guarantee or a prepayment guarantee or security bond. For that purpose, we have a guaranteed line of DKK 94,620 $13,800 September 30, 2019) September 30, 2018, 94,620 $14,690 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. The Company has assessed the adequacy of the recorded warranty liability at the end of the 3 rd 2019 4 7% 3% January 1, 2019 Changes in the Company's current and long-term warranty obligations, including deferred revenue on extended warranty contracts included in accrued expenses on the balance sheet, are as follows: 2019 Balance at December 31, 2018 $ 432,225 Current year warranty expense 621,142 Change in estimate related to pre-existing warranties - Payments made (307,596 ) Foreign currency effect (31,001 ) Balance at September 30, 2019 $ 714,770 Purchase obligation not $3.8 September 30, 2019 $1.6 no

Note 6 - Earnings Per Share

Note 6 - Earnings Per Share	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 6 The following data shows the amounts used in computing earnings per share and the effect on income and the weighted average number of shares of potential dilutive common stock for the nine September 30, 2019 2018: For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Net Income (Loss) attributable to LiqTech International, Inc. $ 656,357 $ (921,949 ) $ 837,387 $ (2,718,764 ) Weighted average number of common shares used in basic earnings per share 20,547,667 18,185,137 19,350,533 15,199,809 Effect of dilutive securities, stock options and warrants 15,873 - 16,012 - Weighted average number of common shares and potential dilutive common shares outstanding used in dilutive earnings per share 20,563,540 18,185,137 19,366,545 15,199,809 For the nine September 30, 2019, 25,000 $2.96 For the nine September 30, 2018, 113,750 $2.96 100,000 $6.60 not

Note 7 - Stockholders' Equity

Note 7 - Stockholders' Equity	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	NOTE 7 Common Stock 25,000,000 $0.001 September 30, 2019, December 31, 2018, 20,547,668 4 1 April 8, 2019) 18,228,887 Voting one not Dividends -- may may Liquidation Rights -- Other Matters -- no no Preferred Stock -- one may may The Company has 2,500,000 $0.001 September 30, 2019 December 31, 2018, 0 Stock Issuances Since January 1, 2019, 4 1 April 8, 2019): On March 5, 2019, 24,827 $112,500 On January 24, January 28, February 6 March 1, 2019, 45,000 2015 $2.96 $133,200. On May 22, 2019, 2,215,862 $7.25 $14,599,338 $1,463,446 On June 6, 2019 28,887 2014. For the nine September 30, 2019 2018, $62,278 $33,267 Stock Options In August 2015, September 30, 2019, 25,000 The Company recognizes compensation costs for stock option awards to employees based on their grant-date fair value. The value of each stock option is estimated on the date of grant using the Black-Scholes option-pricing model. The Company recognized stock-based compensation expense related to the options of $0 $33,267 nine September 30, 2019 2018, September 30, 2019, $0 A summary of the status of the options outstanding under the Company’s stock option plan at September 30, 2019 Options Outstanding Options Exercisable Exercise Number Weighted (years) Weighted Number Weighted $ 2.96 25,000 0.87 $ 2.96 25,000 $ 2.96 Total 25,000 0.87 $ 2.96 25,000 $ 2.96 A summary of the status of the options at September 30, 2019, Shares Weighted Average Weighted Outstanding at beginning of period 70,000 $ 2.96 1.62 $ - Granted - - - - Exercised (45,000 ) - - - Forfeited - - - - Expired - - - - Outstanding at end of period 25,000 $ 2.96 0.87 $ - Vested and expected to vest 25,000 $ 2.96 0.87 $ - Exercisable end of period 25,000 $ 2.96 0.87 $ -

Note 8 - Significant Customers

Note 8 - Significant Customers / Concentration / Disaggregated Revenue	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 8 The following table presents customers accounting for 10% For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer A 34 % * 31 % * Customer B * * 20 % * Customer C 28 % * 17 % * * Zero or less than 10% The following table presents customers accounting for 10% September 30, 2019 December 31, 2018 Customer A 49 % 58 % Customer C 16 % * The Company sells products throughout the world; disaggregated revenue by geographical region is as follows for the three nine September 30, 2019 2018: For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 United States and Canada $ 701,194 $ 273,806 $ 1,389,423 $ 643,556 Australia 139,451 181,174 354,965 463,967 South America - 22,775 - 50,452 Asia 2,962,521 154,715 5,135,327 1,083,332 Europe 5,869,550 2,714,734 19,511,385 7,095,307 $ 9,672,716 $ 3,347,204 $ 26,391,100 $ 9,336,614 The Company’s disaggregated revenue by product line is as follows for the three nine September 30, 2019 2018: For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Ceramic diesel particulate $ 1,330,337 $ 1,841,136 $ 4,320,839 $ 5,085,203 Liquid filters and systems 7,920,745 1,426,107 21,414,214 3,878,355 Development projects 137,148 79,961 371,561 373,056 Plastic products 284,486 - 284,486 - $ 9,672,716 $ 3,347,204 $ 26,391,100 $ 9,336,614 As of September 30, 2019, 90% 10% September 30, 2018, 91% 9%

Note 9 - Acquisition

Note 9 - Acquisition	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Business Combination Disclosure [Text Block]	NOTE 9 On September 4, 2019 The acquisition was accounted for as a business combination in accordance with ASC 805, not not no one not $1,332,090 may $888,060 3 $614,300 may The purchase price calculation is as follows: Cash $ 1,332,090 Liabilities short-term 296,020 Liabilities long-term 592,040 Total $ 2,220,150 The following table summarizes the preliminary estimated fair value of the assets acquired and liabilities assumed at the date of purchase: Cash and bank balances $ 177,188 Account receivables 600,441 Inventory 323,403 Other receivables / deferred expenses 59,235 Deposits 53,304 Property and Equipment 1,397,421 Account payables (99,490 ) Other debt and accrued expenses (660,990 ) Accrued income tax (31,146 ) Deferred tax liability (213,516 ) 1,605,850 Goodwill 614,300 $ 2,220,150 Transaction and other costs directly related to the acquisition of BS Plastic A/S, consisting primarily of professional fees, have amounted to approximately $29,500

Note 10 - Subsequent Events

Note 10 - Subsequent Events	9 Months Ended
	Sep. 30, 2019
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 10 - SUBSEQUENT EVENTS The Company’s management reviewed material events through November 14, 2019 no

Significant Accounting Policies

Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 30, 2019
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., the “Company” and its subsidiaries. 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 and diesel particulate air filters in 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% May 2011. LiqTech International A/S, a Danish corporation, incorporated on January 15, 2000 ( 100% LiqTech NA, Inc. (“LiqTech NA”), incorporated in Delaware on July 1, 2005, 100% LiqTech Systems A/S, a Danish Corporation ("LiqTech Systems") was incorporated on September 1, 2009 BS Plastic A/S, a Danish Corporation ("BS Plastic") was acquired on September 1, 2019 LiqTech Germany (“LiqTech Germany”), a 100% December 9, 2011, 2019. LiqTech PTE Ltd (“LiqTech Sing”), a 95% January 19, 2012, 2019.
Consolidation, Policy [Policy Text Block]	Consolidation --
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Functional Currency / Foreign currency translation -- nine September 30, 2019 2018.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash, Cash Equivalents and Restricted Cash -- three September 30, 2019 2018, $1,678,936 $0, no September 30, 2019 December 31, 2018.
Loans and Leases Receivable, Allowance for Loan Losses Policy [Policy Text Block]	Accounts Receivable -- The roll forward of the allowance for doubtful accounts for the nine September 30, 2019 December 31, 2018 September 30, 2019 December 31, 2018 Allowance for doubtful accounts at the beginning of the period $ 971,772 $ 660,581 Addition from acquisition 21,895 - Bad debt expense 3,763 353,562 Receivables written off during the periods (3,494 ) - Effect of currency translation (48,057 ) (42,371 ) Allowance for doubtful accounts at the end of the period $ 945,879 $ 971,772
Inventory, Policy [Policy Text Block]	Inventory -- first first
Lessee, Leases [Policy Text Block]	Leases -- In February 2016, No. 2016 02, 842” On January 1, 2019, 842 not 12 not not may $2.1 $2.1 842 not
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment -- three ten
Investment, Policy [Policy Text Block]	Long-Term Investments -- may may not may
Goodwill and Intangible Assets, Policy [Policy Text Block]	Intangible Assets -- 350, two ten
Revenue from Contract with Customer [Policy Text Block]	Accounting policy January 1, 2018, 606, 2015, 2016 2017 January 1, 2018. not For membrane and DPF product sales, revenue is recognized when performance obligations under the terms of a contract with the customer are satisfied, which occurs when control of the membrane, DPF or services are transferred to the customer. The majority of the Company's sales contracts contain performance obligations satisfied at a point in time when title and 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 are 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 for 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 based upon signed acceptance of the system by the customer upon shipment of the system based on the terms of the contract. For the majority of systems, the Company transfers control and recognizes revenue when products are shipped to the customer according to the terms of the contract or purchase order. In connection with the system it is normal procedure to issue a FAT (Factory Acceptance Test) stating that the customer has accepted the performance of the system as it is being shipped from the 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 warranty and maintenance services. For the sale of aftermarket parts, the Company transfers control and recognizes revenue when parts are shipped to the customer or services are provided. 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. For invoicing to customers where the transfer of control has not 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 filtrations systems. We measure 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 sheets 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 sheets as Contract liabilities. In Denmark, Value Added Tax (“VAT”) of 25% not The Company’s disaggregated revenue is reported in Note 8.
Advertising Cost [Policy Text Block]	Advertising Cost -- $8,280 $21,693 three $80,630 $25,018 nine September 30, 2019 2018,
Research, Development, and Computer Software, Policy [Policy Text Block]	Research and Development Cost -- $189,216 $152,849 three $591,572 $498,526, nine September 30, 2019 2018
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 Options and Awards -- 7 718, $23,167 $5,833 three $174,778 $93,267 nine September 30, 2019 2018,
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, prepaid expenses, investments, accounts payable, accrued expenses, capital lease obligations and notes payable approximates 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 June 2018, No. 2018 07, 718” 718 first 2019, not In August 2018, 2018 15 2018 15” Intangibles - Goodwill and Other - Internal-Use Software (Topic 350 40 2018 15 December 15, 2019 In August 2018, No. 2018 13, 820 December 15, 2019, In August 2018, No. 33 10532, 10 November 5, 2018. first 10 first 2019 In February 2016, No. 2016 02, 842 842" one 842 January 1, 2019 not $2.1 $2.1 one 842 not 4 In November 2016, No. 2016 18, September 30, 2019 $1,678,936 $9,957,472 $11,636,408 December 31, 2018 $0 $3,776,111 Other recent accounting pronouncements issued by the FASB did not not

Note 1 - Summary of Significa_2

Note 1 - Summary of Significant Accounting Policies (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Financing Receivable, Allowance for Credit Loss [Table Text Block]	September 30, 2019 December 31, 2018 Allowance for doubtful accounts at the beginning of the period $ 971,772 $ 660,581 Addition from acquisition 21,895 - Bad debt expense 3,763 353,562 Receivables written off during the periods (3,494 ) - Effect of currency translation (48,057 ) (42,371 ) Allowance for doubtful accounts at the end of the period $ 945,879 $ 971,772

Note 2 - Inventory (Tables)

Note 2 - Inventory (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Schedule of Inventory, Current [Table Text Block]	2019 2018 Furnace parts and supplies $ 611,911 $ 596,806 Raw materials 2,101,188 1,659,826 Work in process 1,644,988 1,691,175 Finished goods and filtration systems 1,608,185 1,596,042 Reserve for obsolescence (780,038 ) (1,111,794 ) Net Inventory $ 5,186,234 $ 4,432,055

Note 4 - Leases (Tables)

Note 4 - Leases (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Lessee, Operating and Finance Lease, Assets and Liabilities [Table Text Block]	September 30, 2019 December 31, 2018 Operating leases Operating lease right-of-use $ 2,200,130 $ - Operating lease liabilities – current $ 681,481 $ - Operating lease liabilities – long-term 1,561,076 - Total operating lease liabilities $ 2,242,557 $ - Finance leases Property and equipment, at cost $ 1,115,891 $ 1,171,295 Accumulated depreciation (1,115,891 ) (1,162,256 ) Property and equipment, net $ - $ 9,039 Finance lease liabilities – current $ - $ 13,789 Finance lease liabilities – long-term - - Total finance lease liabilities $ - $ 13,789 Weighted average remaining lease term: Operating leases 4.3 - Finance lease - 0.8 Weighted average discount rate: Operating leases 6.9 % - Finance leases - % 7.3 %
Maturity of Operating and Finance Lease Liabilities [Table Text Block]	Operating lease Finance lease October 2019 – September 2020 $ 711,058 $ - October 2020 – September 2021 574,753 - October 2021 – September 2022 468,283 - October 2022 – September 2023 433,132 - October 2023 – September 2024 357,179 - Thereafter - - Total payment under lease agreements 2,544,405 - Less imputed interest (301,848 ) - Total lease liability $ 2,242,557 $ -
Schedule of Future Minimum Lease Payments for Capital Leases and Operating Leases [Table Text Block]	Year ending December 31, Operating lease 2019 $ 712,250 2020 578,997 2021 402,584 2022 350,249 Thereafter 560,977 Total $ 2,605,057

Note 5 - Agreements and Commi_2

Note 5 - Agreements and Commitments (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	2019 Balance at December 31, 2018 $ 432,225 Current year warranty expense 621,142 Change in estimate related to pre-existing warranties - Payments made (307,596 ) Foreign currency effect (31,001 ) Balance at September 30, 2019 $ 714,770

Note 6 - Earnings Per Share (Ta

Note 6 - Earnings Per Share (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Schedule of Weighted Average Number of Shares [Table Text Block]	For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Net Income (Loss) attributable to LiqTech International, Inc. $ 656,357 $ (921,949 ) $ 837,387 $ (2,718,764 ) Weighted average number of common shares used in basic earnings per share 20,547,667 18,185,137 19,350,533 15,199,809 Effect of dilutive securities, stock options and warrants 15,873 - 16,012 - Weighted average number of common shares and potential dilutive common shares outstanding used in dilutive earnings per share 20,563,540 18,185,137 19,366,545 15,199,809

Note 7 - Stockholders' Equity (

Note 7 - Stockholders' Equity (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	Options Outstanding Options Exercisable Exercise Number Weighted (years) Weighted Number Weighted $ 2.96 25,000 0.87 $ 2.96 25,000 $ 2.96 Total 25,000 0.87 $ 2.96 25,000 $ 2.96
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]	Shares Weighted Average Weighted Outstanding at beginning of period 70,000 $ 2.96 1.62 $ - Granted - - - - Exercised (45,000 ) - - - Forfeited - - - - Expired - - - - Outstanding at end of period 25,000 $ 2.96 0.87 $ - Vested and expected to vest 25,000 $ 2.96 0.87 $ - Exercisable end of period 25,000 $ 2.96 0.87 $ -

Note 8 - Significant Customer_2

Note 8 - Significant Customers / Concentration / Disaggregated Revenue (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]	For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Customer A 34 % * 31 % * Customer B * * 20 % * Customer C 28 % * 17 % * September 30, 2019 December 31, 2018 Customer A 49 % 58 % Customer C 16 % *
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 United States and Canada $ 701,194 $ 273,806 $ 1,389,423 $ 643,556 Australia 139,451 181,174 354,965 463,967 South America - 22,775 - 50,452 Asia 2,962,521 154,715 5,135,327 1,083,332 Europe 5,869,550 2,714,734 19,511,385 7,095,307 $ 9,672,716 $ 3,347,204 $ 26,391,100 $ 9,336,614
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	For the Three Months For the Nine Months Ended September 30, Ended September 30, 2019 2018 2019 2018 Ceramic diesel particulate $ 1,330,337 $ 1,841,136 $ 4,320,839 $ 5,085,203 Liquid filters and systems 7,920,745 1,426,107 21,414,214 3,878,355 Development projects 137,148 79,961 371,561 373,056 Plastic products 284,486 - 284,486 - $ 9,672,716 $ 3,347,204 $ 26,391,100 $ 9,336,614

Note 9 - Acquisition (Tables)

Note 9 - Acquisition (Tables)	9 Months Ended
	Sep. 30, 2019
Notes Tables
Schedule of Recognized Identified Assets Acquired and Liabilities Assumed [Table Text Block]	Cash $ 1,332,090 Liabilities short-term 296,020 Liabilities long-term 592,040 Total $ 2,220,150 Cash and bank balances $ 177,188 Account receivables 600,441 Inventory 323,403 Other receivables / deferred expenses 59,235 Deposits 53,304 Property and Equipment 1,397,421 Account payables (99,490 ) Other debt and accrued expenses (660,990 ) Accrued income tax (31,146 ) Deferred tax liability (213,516 ) 1,605,850 Goodwill 614,300 $ 2,220,150

Note 1 - Summary of Significa_3

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Jan. 01, 2019	Dec. 31, 2018
Restricted Cash and Cash Equivalents, Current, Total	$ 1,678,936		$ 1,678,936			$ 0
Cash, Uninsured Amount	0		0			0
Operating Lease, Right-of-Use Asset	2,200,130		2,200,130
Operating Lease, Liability, Total	2,242,557		$ 2,242,557
Value Added Tax Of Invoice, Percentage			25.00%
Advertising Expense	8,280	$ 21,693	$ 80,630	$ 25,018
Research and Development Expense, Total	189,216	152,849	591,572	498,526
Share-based Payment Arrangement, Expenses Including Shares Issued as a Bonus	23,167	$ 5,833	174,778	$ 93,267
Cash and Cash Equivalents, at Carrying Value, Ending Balance	9,957,472		9,957,472			$ 3,776,111
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending Balance	$ 11,636,408		$ 11,636,408
Minimum [Member]
Property, Plant and Equipment, Useful Life			3 years
Finite-Lived Intangible Asset, Useful Life			2 years
Maximum [Member]
Property, Plant and Equipment, Useful Life			10 years
Finite-Lived Intangible Asset, Useful Life			10 years
Accounting Standards Update 2016-02 [Member]
Operating Lease, Right-of-Use Asset					$ 2,100,000
Operating Lease, Liability, Total					$ 2,100,000
LiqTech USA [Member] | LiqTech International DK [Member]
Percentage of Subsidiary Owned	100.00%		100.00%
LiqTech USA [Member] | LiqTech NA [Member]
Percentage of Subsidiary Owned	100.00%		100.00%
LiqTech International DK [Member] | LiqTech Germany [Member]
Percentage of Subsidiary Owned	100.00%		100.00%
LiqTech International DK [Member] | LiqTech PTE [Member]
Percentage of Subsidiary Owned	95.00%		95.00%
LiqTech USA [Member]
Noncontrolling Interest, Ownership Percentage by Parent	100.00%		100.00%

Note 1 - Summary of Significa_4

Note 1 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Allowance for doubtful accounts	$ 971,772	$ 660,581
Addition from acquisition	21,895
Bad debt expense	3,763	353,562
Receivables written off during the periods	(3,494)
Effect of currency translation	(48,057)	(42,371)
Allowance for doubtful accounts	$ 945,879	$ 971,772

Note 2 - Inventory - Summary of

Note 2 - Inventory - Summary of Inventory (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Furnace parts and supplies	$ 611,911	$ 596,806
Raw materials	2,101,188	1,659,826
Work in process	1,644,988	1,691,175
Finished goods and filtration systems	1,608,185	1,596,042
Reserve for obsolescence	(780,038)	(1,111,794)
Net Inventory	$ 5,186,234	$ 4,432,055

Note 3 - Lines of Credit (Detai

Note 3 - Lines of Credit (Details Textual)	Sep. 30, 2019USD ($)	Sep. 30, 2019DKK (kr)	Sep. 30, 2018USD ($)	Sep. 30, 2018DKK (kr)
Line of Credit Facility, Maximum Borrowing Capacity	$ 13,800	kr 94,620
Guarantor Obligations, Current Carrying Value			$ 14,690	kr 94,620

Note 4 - Leases - Balance Sheet

Note 4 - Leases - Balance Sheet Information (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
Operating Lease, Right-of-Use Asset	$ 2,200,130
Operating lease liabilities – current	681,481
Operating lease liabilities – long-term	1,561,076
Operating Lease, Liability, Total	2,242,557
Property and equipment, at cost	1,115,891	1,171,295
Accumulated depreciation	(1,115,891)	(1,162,256)
Property and equipment, net		9,039
Finance lease liabilities – current		13,789
Finance lease liabilities – long-term
Total lease liability		$ 13,789
Operating leases (Year)	4 years 109 days
Finance lease (Year)		292 days
Operating leases	6.90%
Finance leases		7.30%

Note 4 - Leases - Maturities of

Note 4 - Leases - Maturities of Lease Liabilities (Details) - USD ($)	Sep. 30, 2019	Dec. 31, 2018
October 2019 – September 2020	$ 711,058
October 2019 – September 2020
October 2020 – September 2021	574,753
October 2020 – September 2021
October 2021 – September 2022	468,283
October 2021 – September 2022
October 2022 – September 2023	433,132
October 2022 – September 2023
October 2023 – September 2024	357,179
October 2023 – September 2024
Thereafter
Thereafter
Total payment under lease agreements	2,544,405
Total payment under lease agreements
Less imputed interest	(301,848)
Less imputed interest
Operating Lease, Liability, Total	2,242,557
Total lease liability		$ 13,789

Note 4 - Leases - Payments Unde

Note 4 - Leases - Payments Under Operating and Finance Lease (Details)	Dec. 31, 2018USD ($)
2019, Operating lease	$ 712,250
2020, Operating lease	578,997
2021, Operating lease	402,584
2022, Operating lease	350,249
Thereafter, Operating lease	560,977
Total	$ 2,605,057

Note 5 - Agreements and Commi_3

Note 5 - Agreements and Commitments (Details Textual)

Feb. 27, 2019USD ($)

Feb. 27, 2019DKK (kr)

Nov. 20, 2018USD ($)

Nov. 20, 2018DKK (kr)

Sep. 30, 2019USD ($)

Sep. 30, 2018USD ($)

Sep. 30, 2019USD ($)

Sep. 30, 2018USD ($)

Sep. 30, 2019DKK (kr)

Jan. 01, 2019

Dec. 31, 2018

Sep. 30, 2018DKK (kr)

Defined Contribution Plan, Cost

$ 3,007

$ 2,569

$ 8,684

$ 8,275

Line of Credit Facility, Maximum Borrowing Capacity

13,800

13,800

kr 94,620

Guarantor Obligations, Current Carrying Value

$ 14,690

$ 14,690

kr 94,620

Warranty Accrual, Percent

3.00%

7.00%

Purchase Obligation, Total

3,800,000

3,800,000

Prepaid Purchase Obligation

$ 1,600,000

$ 1,600,000

LiqTech International AS [Member] | Claim with Former Supplier for Breach of Agreement [Member]

Loss Contingency, Damages Sought, Value

$ 68,800

kr 448,500

LiqTech International AS [Member] | Claim with Former Supplier for Services Rendered [Member]

Loss Contingency, Damages Sought, Value

$ 83,400

kr 543,905

Note 5 - Agreements and Commi_4

Note 5 - Agreements and Commitments - Product Warranties (Details)	9 Months Ended
	Sep. 30, 2019USD ($)
Balance	$ 432,225
Current year warranty expense	621,142
Change in estimate related to pre-existing warranties
Payments made	(307,596)
Foreign currency effect	(31,001)
Balance	$ 714,770

Note 6 - Earnings Per Share (De

Note 6 - Earnings Per Share (Details Textual) - $ / shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Mar. 31, 2019	Dec. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 2.96			$ 2.96
Class of Warrant or Right, Exercise Price of Warrants or Rights		$ 6.60
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 2.96	$ 2.96	$ 2.96
Share-based Payment Arrangement, Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	25,000	113,750
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		100,000

Note 6 - Earnings Per Share - A

Note 6 - Earnings Per Share - Amounts Used in Computing Earnings Per Share (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Income (Loss) attributable to LiqTech International, Inc.	$ 656,357	$ (921,949)	$ 837,387	$ (2,718,764)
Weighted average number of common shares used in basic earnings per share (in shares)	20,547,667	18,185,137	19,350,533	15,199,809
Effect of dilutive securities, stock options and warrants (in shares)	15,873		16,012
Weighted average number of common shares and potential dilutive common shares outstanding used in dilutive earnings per share (in shares)	20,563,540	18,185,137	19,366,545	15,199,809

Note 7 - Stockholders' Equity_2

Note 7 - Stockholders' Equity (Details Textual)	Jun. 06, 2019shares	May 22, 2019USD ($)$ / sharesshares	Mar. 05, 2019USD ($)shares	Apr. 08, 2018	Mar. 01, 2019USD ($)$ / sharesshares	Sep. 30, 2019USD ($)$ / sharesshares	Sep. 30, 2018USD ($)	Dec. 31, 2018$ / sharesshares
Common Stock, Shares Authorized						25,000,000		25,000,000
Common Stock, Par or Stated Value Per Share | $ / shares						$ 0.001		$ 0.001
Common Stock, Shares, Issued, Total						20,547,668		18,228,887
Common Stock, Shares, Outstanding, Ending Balance						20,547,668		18,228,887
Stockholders' Equity Note, Stock Split, Conversion Ratio						4		4
Preferred Stock, Shares Authorized						2,500,000		2,500,000
Preferred Stock, Shares Issued, Total						0		0
Preferred Stock, Shares Outstanding, Ending Balance						0		0
Proceeds from Stock Options Exercised | $						$ 133,200
Proceeds from Issuance of Common Stock | $						$ 14,601,554	5,865,077
Class of Warrant or Right, Exercised During Period	28,887
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance						25,000		70,000
Share-based Payment Arrangement, Nonvested Award, Option, Cost Not yet Recognized, Amount | $						$ 0
The 2011 Stock Options Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance						25,000
Public Offering [Member]
Stock Issued During Period, Shares, New Issues		2,215,862
Share Price | $ / shares		$ 7.25
Proceeds from Issuance of Common Stock | $		$ 14,599,338
Payments of Stock Issuance Costs | $		$ 1,463,446
The 2015 Stock Option Plan [Member]
Stock Issued During Period, Shares, New Issues					45,000
Share Price | $ / shares					$ 2.96
Proceeds from Stock Options Exercised | $					$ 133,200
Stock Awards Other than Options [Member]
Share-based Payment Arrangement, Expense | $						$ 62,278	33,267
Share-based Payment Arrangement, Option [Member] | The 2011 Stock Options Plan [Member]
Share-based Payment Arrangement, Expense | $						$ 0	$ 33,267
Director [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross			24,827
Stock Issued During Period, Value, Restricted Stock Award, Gross | $			$ 112,500
Convertible Preferred Stock [Member]
Preferred Stock, Shares Issued, Total						0		0
Preferred Stock, Shares Outstanding, Ending Balance						0		0
Reverse Stock Split [Member]
Stockholders' Equity Note, Stock Split, Conversion Ratio				4

Note 7 - Stockholders' Equity -

Note 7 - Stockholders' Equity - Warrants Outstanding by Exercise Price (Details) - $ / shares	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
Exercise prices of warrants (in dollars per share)		$ 6.60
Warrants outstanding (in shares)	25,000
Warrants outstanding, weighted average remaining contractual life (Year)	317 days
Warrants outstanding, weighted average exercise price (in dollars per share)	$ 2.96
Warrants exercisable (in shares)	25,000
Warrants exercisable, weighted average exercise price (in dollars per share)	$ 2.96
Warrant 1 [Member]
Exercise prices of warrants (in dollars per share)	$ 2.96
Warrants outstanding (in shares)	25,000
Warrants outstanding, weighted average remaining contractual life (Year)	317 days
Warrants outstanding, weighted average exercise price (in dollars per share)	$ 2.96
Warrants exercisable (in shares)	25,000
Warrants exercisable, weighted average exercise price (in dollars per share)	$ 2.96

Note 7 - Stockholders' Equity_3

Note 7 - Stockholders' Equity - Status of Options and Changes During the Year (Details) - USD ($)	9 Months Ended	12 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Outstanding, shares (in shares)	70,000
Outstanding, weighted average exercise price (in dollars per share)	$ 2.96
Outstanding, average remaining life (Year)	317 days	1 year 226 days
Granted, shares (in shares)
Granted, weighted average exercise price (in dollars per share)
Exercised, shares (in shares)	(45,000)
Exercised, weighted average exercise price (in dollars per share)
Forfeited, shares (in shares)
Forfeited, weighted average exercise price (in dollars per share)
Expired, shares (in shares)
Expired, weighted average exercise price (in dollars per share)
Outstanding, shares (in shares)	25,000	70,000
Outstanding, weighted average exercise price (in dollars per share)	$ 2.96	$ 2.96
Outstanding, weighted average intrinsic value
Vested and expected to vest, shares (in shares)	25,000
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 2.96
Vested and expected to vest, average remaining life (Year)	317 days
Vested and expected to vest, weighted average intrinsic value
Exercisable end of period, shares (in shares)	25,000
Exercisable end of period, weighted average exercise price (in dollars per share)	$ 2.96
Exercisable end of period, average remaining life (Year)	317 days
Exercisable end of period, weighted average intrinsic value

Note 8 - Significant Customer_3

Note 8 - Significant Customers / Concentration / Disaggregated Revenue (Details Textual) - Geographic Concentration Risk [Member] - Assets, Total [Member]	9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018
DENMARK
Concentration Risk, Percentage	90.00%	91.00%
UNITED STATES
Concentration Risk, Percentage	10.00%	9.00%

Note 8 - Significant Customer_4

Note 8 - Significant Customers / Concentration / Disaggregated Revenue - Concentration of Risk (Details) - Customer Concentration Risk [Member]	3 Months Ended		9 Months Ended	12 Months Ended
	Sep. 30, 2019		Sep. 30, 2019	Dec. 31, 2018
Revenue Benchmark [Member] | Customer A [Member]
Concentration Risk, Percentage	34.00%		31.00%
Revenue Benchmark [Member] | Customer B [Member]
Concentration Risk, Percentage		[1]	20.00%
Revenue Benchmark [Member] | Customer C [Member]
Concentration Risk, Percentage	28.00%		17.00%
Accounts Receivable [Member] | Customer A [Member]
Concentration Risk, Percentage			49.00%	58.00%
Accounts Receivable [Member] | Customer C [Member]
Concentration Risk, Percentage			16.00%		[1]
[1]	Zero or less than 10%

Note 8 - Significant Customer_5

Note 8 - Significant Customers / Concentration / Disaggregated Revenue - Net Sales by Geographical Region (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Sales	$ 9,672,716	$ 3,347,204	$ 26,391,100	$ 9,336,614
Reportable Geographical Components [Member] | US And Canada [Member]
Net Sales	701,194	273,806	1,389,423	643,556
Reportable Geographical Components [Member] | AUSTRALIA
Net Sales	139,451	181,174	354,965	463,967
Reportable Geographical Components [Member] | South America [Member]
Net Sales		22,775		50,452
Reportable Geographical Components [Member] | Asia [Member]
Net Sales	2,962,521	154,715	5,135,327	1,083,332
Reportable Geographical Components [Member] | Europe [Member]
Net Sales	$ 5,869,550	$ 2,714,734	$ 19,511,385	$ 7,095,307

Note 8 - Significant Customer_6

Note 8 - Significant Customers / Concentration / Disaggregated Revenue - Sales by Product Line (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Net Sales	$ 9,672,716	$ 3,347,204	$ 26,391,100	$ 9,336,614
Ceramic Diesel Particulate [Member]
Net Sales	1,330,337	1,841,136	4,320,839	5,085,203
Liquid Filters [Member]
Net Sales	7,920,745	1,426,107	21,414,214	3,878,355
Development Projects [Member]
Net Sales	137,148	79,961	371,561	373,056
Plastic Products [Member]
Net Sales	$ 284,486		$ 284,486

Note 9 - Acquisition (Details T

Note 9 - Acquisition (Details Textual) - BS Plastic [Member]	Sep. 04, 2019USD ($)
Payments to Acquire Businesses, Gross	$ 1,332,090
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	$ 888,060
Business Combination, Contingent Consideration Arrangements, Earn Out Period	3 years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Including Goodwill	$ 614,300
Business Combination, Acquisition Related Costs	$ 29,500

Note 9 - Acquisition - Purchase

Note 9 - Acquisition - Purchase Price Allocation, Assets Acquired and Liabilities Assumed (Details) - USD ($)	Sep. 04, 2019	Sep. 30, 2019	Dec. 31, 2018
Goodwill		$ 605,313
BS Plastic [Member]
Payments to Acquire Businesses, Gross	$ 1,332,090
Liabilities short-term	296,020
Liabilities long-term	592,040
Total	2,220,150
Cash and bank balances	177,188
Account receivables	600,441
Inventory	323,403
Other receivables / deferred expenses	59,235
Deposits	53,304
Property and Equipment	1,397,421
Account payables	(99,490)
Other debt and accrued expenses	(660,990)
Accrued income tax	(31,146)
Deferred tax liability	(213,516)
	1,605,850
Goodwill	614,300
	$ 2,220,150