LiqTech International (LIQT) 10-Q 14 Aug 18 2018 Q2 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	6 Months Ended
	Jun. 30, 2018	Aug. 14, 2018
Document Information [Line Items]
Entity Registrant Name	LIQTECH INTERNATIONAL INC
Entity Central Index Key	1,307,579
Trading Symbol	liqt
Current Fiscal Year End Date	--12-31
Entity Filer Category	Smaller Reporting Company
Entity Current Reporting Status	Yes
Entity Voluntary Filers	No
Entity Well-known Seasoned Issuer	No
Entity Common Stock, Shares Outstanding (in shares)		72,740,547
Document Type	10-Q
Document Period End Date	Jun. 30, 2018
Document Fiscal Year Focus	2,018
Document Fiscal Period Focus	Q2
Amendment Flag	false

Consolidated Balance Sheets (Cu

Consolidated Balance Sheets (Current Period Unaudited) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Current Assets:
Cash	$ 4,491,500	$ 2,486,199
Accounts receivable, net	1,444,794	1,124,842
Other receivables	314,025	636,539
Contract assets	1,320,938	490,100
Inventories, net	4,494,522	4,661,866
Prepaid expenses	66,323	28,151
Total Current Assets	12,132,102	9,427,697
Property and Equipment, net accumulated depreciation	1,633,984	1,959,205
Other Assets:
Investments at cost	5,827	6,001
Other intangible assets	1,978	3,349
Deposits	353,833	283,686
Total Other Assets	361,638	293,036
Total Assets	14,127,724	11,679,938
Current Liabilities:
Current portion of capital lease obligations	11,475	26,186
Accounts payable	1,524,403	1,775,230
Accrued expenses	1,098,876	1,724,986
Contract liabilities	454,863	306,845
Accrued income taxes payable	580	580
Deferred revenue / customers deposits	428,271	933,994
Total Current Liabilities	3,518,469	4,767,821
Total Liabilities	3,518,469	4,767,821
Agreements and Contingencies See Note 9
Stockholders' Equity:
Series A Convertible Preferred Stock; par value $0.001, 10,000,000 shares authorized, 0 and 2,200,837 shares issued and outstanding at June 30, 2018 and December 31, 2017 respectively		2,201
Common stock; par value $0,001, 100,000,000 shares authorized, 72,740,547 and 44,429,264 shares issued and outstanding at June 30, 2018 and December 31, 2017, respectively	72,741	44,430
Additional paid-in capital	46,356,874	40,457,907
Accumulated deficit	(30,268,509)	(28,471,696)
Deferred compensation	(52,499)	(79,933)
Other comprehensive income, net	(5,499,352)	(5,040,792)
Total Stockholders' Equity	10,609,255	6,912,117
Total Liabilities and Stockholders' Equity	$ 14,127,724	$ 11,679,938

Consolidated Balance Sheets (C3

Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	2,200,837	2,200,837
Preferred stock, shares outstanding (in shares)	2,200,837	2,200,837
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)	72,740,547	44,429,264
Common stock, shares outstanding (in shares)	72,740,547	44,429,264

Consolidated Statements of Oper

Consolidated Statements of Operations (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Sales	$ 3,598,028	$ 2,926,200	$ 5,989,410	$ 5,894,274
Cost of Goods Sold	2,938,206	2,733,526	5,389,180	5,430,183
Gross Profit	659,822	192,674	600,230	464,091
Operating Expenses:
Selling expenses	463,998	534,359	873,790	984,742
General and administrative expenses	573,047	491,929	1,257,213	1,085,567
Non-cash compensation expenses	9,161	29,780	87,434	125,958
Research and development expenses	176,281	114,010	345,677	253,346
Total Operating Expense	1,222,487	1,170,078	2,564,114	2,449,613
Loss from Operations	(562,665)	(977,404)	(1,963,884)	(1,985,522)
Other Income (Expense)
Interest and other income	7,173	77	10,457	303
Interest expense	(4,174)	(8,706)	(60,474)	(19,527)
Gain (loss) on currency transactions	296,140	(206,362)	217,086	(27,687)
Gain on sale of fixed assets				6,768
Total Other Income (Expense)	299,139	(214,991)	167,069	(40,143)
Loss Before Income Taxes	(263,526)	(1,192,395)	(1,796,815)	(2,025,665)
Income Tax Expense
Net Loss	$ (263,526)	$ (1,192,395)	$ (1,796,815)	$ (2,025,665)
Basic Loss Per Share (in dollars per share)	$ (0.004)	$ (0.03)	$ (0.03)	$ (0.05)
Weighted Average Common Shares Outstanding (in shares)	64,859,333	40,667,107	54,729,618	38,761,647
Diluted Loss Per Share (in dollars per share)	$ (0.004)	$ (0.03)	$ (0.03)	$ (0.05)
Weighted Average Common Shares Outstanding Assuming Dilution (in shares)	64,859,333	40,667,107	54,729,618	38,761,647

Consolidated Statements of Othe

Consolidated Statements of Other Comprehensive Income (Unaudited) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Loss	$ (263,526)	$ (1,192,395)	$ (1,796,815)	$ (2,025,665)
Currency Translation, Net of Taxes	(633,427)	400,691	(458,560)	311,888
Other Comprehensive Loss	$ (896,953)	$ (791,704)	$ (2,255,375)	$ (1,713,777)

Consolidated Statements of Cash

Consolidated Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Cash Flows from Operating Activities:
Net Loss	$ (1,796,815)	$ (2,025,665)
Adjustments to reconcile net loss to net cash provided (used) by operations:
Depreciation and amortization	430,081	503,276
Stock-based compensation	87,434	125,958
Reserve for obsolete inventory	(76,867)
Loss on sale of equipment		(6,768)
Changes in assets and liabilities:
Accounts receivable	2,562	(479,496)
Inventory	166,621	(13,972)
Prepaid expenses/deposits	(78,882)	(77,275)
Accounts payable	(250,828)	(195,763)
Accrued expenses	(1,131,833)	515,928
Long-term contracts	(682,820)	(175,982)
Total Adjustments	(1,534,532)	195,906
Net Cash Used in Operating Activities	(3,331,347)	(1,829,759)
Cash Flows from Investing Activities:
Purchase of property and equipment	(82,992)	(70,679)
Proceeds from sale/recovery of property and equipment		10,349
Net Cash Used in Investing Activities	(82,992)	(60,330)
Cash Flows from Financing Activities:
Net payments on capital lease obligation	(14,710)	(109,007)
Payments on loans payable		(4,153)
Proceeds from issuance of common stock	6,612,500	1,825,000
Payment of stock offering costs	(747,423)
Net Cash Provided by Financing Activities	5,850,367	1,711,840
Gain (Loss) on Currency Translation	(430,727)	250,269
Net Change in Cash and Cash Equivalents	2,005,301	72,020
Cash and Cash Equivalents at Beginning of Period	2,486,199	1,208,650
Cash and Cash Equivalents at End of Period	4,491,500	1,280,670
Supplemental Disclosures of Cash Flow Information:
Interest Paid	60,474	19,527
Income Taxes
Employee Stock Option [Member]
Supplemental Disclosures of Non-Cash Investing and Financing Activities:
Common stock issued for conversion of mandatory preferred stock	$ 8,803

Note 1 - Summary of Significant

Note 1 - Summary of Significant Accounting Policies	6 Months Ended
	Jun. 30, 2018
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. (“Parent”) and its subsidiaries. The terms "Company", “us", "we" and "our" as used in this report refer to Parent 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 Parent and each of its subsidiaries: LiqTech International, Inc., a Nevada corporation organized in July 2004, LiqTech USA, a Delaware corporation and a wholly-owned subsidiary of Parent formed in May 2011. LiqTech International AS, a Danish corporation, incorporated on January 15, 2000 ( LiqTech NA, Inc. (“LiqTech NA”), incorporated in Delaware on July 1, 2005, LiqTech Systems AS, a Danish Corporation ("LiqTech Systems") (Formerly Provital Solutions A/S) was incorporated on September 1, 2009 LiqTech Germany (“LiqTech Germany”), a 100% December 9, 2011, 2018. LiqTech PTE Ltd (“LiqTech Sing”), a 95% January 19, 2012, 2018. Consolidation -- Functional Currency / Foreign currency translation -- three six June 30, 2018 2017. Cash, Cash Equivalents and Restricted Cash -- three no June 30, 2018 December 31, 2017. Accounts Receivable -- The roll forward of the allowance for doubtful accounts for the six June 30, 2018 December 31, 2017 2018 2017 Allowance for doubtful accounts at the beginning of the period $ 660,581 $ 2,128,452 Bad debt expense 0 (102,189 ) Receivables written off during the periods 0 (1,678,856 ) Effect of currency translation (19,006 ) 313,174 Allowance for doubtful accounts at the end of the period $ 641,575 $ 660,581 Inventory -- first first Property and Equipment -- three ten 4 Long-Term Investments -- may may not may Intangible Assets -- 350, two ten Revenue Recognition and Sales Incentives Revenue Recognition -- Adoption of the new revenue standard: January 1, 2018, 606, 2015, 2016 2017 January 1, 2018. not not Accounting policy not not 25% not 9 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. Impairment losses recognized on receivables or contract assets were not six June 30, 2018. The customer generally arranges and pays for shipping activities. When the Company does arrange for shipping it is billed to the Customer. The Cost to prepare the product for shipment handling are paid by the Company and reported on the line “Cost of goods sold” in the unaudited consolidated statements of operations. System sales are recognized when the Company transfers control based upon signed acceptance of the system by the customer, upon shipment or upon final installation of the system based on the terms of the contract. For the majority of Liquid Membrane Filters and Diesel Particulate Filters, the Company transfers control and recognizes revenue when products are shipped to the customer according to the terms of the contract or purchase order. Aftermarket sales represent part sales, 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, which reflects the costs to perform under these contracts, which corresponds with, and thereby depicts the transfer of control to the customer. The Company has received long-term contracts for grants from government entities for 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. The two June 30, 2018 December 31, 2017 June 30, December 31, 2018 2017 Cost incurred on uncompleted contracts $ 3,073,380 $ 507,633 Estimated earnings 1,972,125 651,304 5,045,505 1,158,937 Billings on uncompleted contracts (4,179,430 ) (975,682 ) Contract asset (liabilities) $ 866,075 $ 183,255 June 30, December 31, 2018 2017 Contract assets $ 1,320,938 $ 490,100 Contract liabilities (454,863 ) (306,845 ) Net contract liabilities $ 866,075 $ 183,255 The Company’s disaggregated revenue is reported in Note 13. Advertising Cost -- $3,326 $4,197 six June 30, 2018 2017, Research and Development Cost -- six June 30, 2018 2017 $345,677 $253,346, Income Taxes -- 740 Income (Loss) Per Share -- 260, not Stock Options and Awards -- 11 718, $87,434 $125,958 $24,367 $24,650 six June 30, 2018 2017, 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 February 25, 2016, 2016 02, December 15, 2018. 8. Other recent accounting pronouncements issued by the FASB did not not

Note 2 - Going Concern

Note 2 - Going Concern	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Substantial Doubt about Going Concern [Text Block]	NOTE 2 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 limited cash and has recently incurred significant losses. These factors raise substantial doubt about the ability of the Company to continue as a going concern. There is no not Management believes the Company is progressing toward alleviating this substantial doubt as to the Company’s ability to continue as a going concern for a period of one April 2018, $6.6 19,448,529 three 2018 2019.

Note 3 - Inventory

Note 3 - Inventory	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Inventory Disclosure [Text Block]	NOTE 3 Inventory consisted of the following at June 30, 2018 December 31, 2017: 2018 2017 Furnace parts and supplies $ 353,800 $ 400,589 Raw materials 1,056,195 1,260,209 Work in process 2,525,039 2,123,418 Finished goods and filtration systems 1,862,421 2,297,743 Reserve for obsolescence (1,302,933 ) (1,420,093 ) Net Inventory $ 4,494,522 $ 4,661,866

Note 4 - Property and Equipment

Note 4 - Property and Equipment	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Property, Plant and Equipment Disclosure [Text Block]	NOTE 4 Property and equipment consisted of the following at June 30, 2018 December 31, 2017: Useful Life 2018 2017 Production equipment 3 - 10 $ 9,739,141 $ 10,114,398 Lab equipment 3 - 10 84,575 87,094 Computer equipment 3 - 5 201,700 204,553 Vehicles 3 - 5 63,322 75,312 Furniture and fixture 5 103,612 106,047 Leasehold improvements 10 1,053,880 1,076,731 11,246,230 11,664,135 Less Accumulated Depreciation (9,612,246 ) (9,704,930 ) Net Property and Equipment $ 1,633,984 $ 1,959,205 Depreciation expense amounted to $428,710 $502,131 six June 30, 2018 2017, 7.

Note 5 - Investments at Costs

Note 5 - Investments at Costs	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Investments in Debt and Marketable Equity Securities (and Certain Trading Assets) Disclosure [Text Block]	NOTE 5 The following tables summarize Level 1, 2 3 As of June 30, 2018 Level 1 Level 2 Level 3 Investments - - 5,827 Total - - 5,827 As of December 31, 2017 Level 1 Level 2 Level 3 Investments - - 6,001 Total - - 6,001 At June 30, 2018, $5,827 $5,827 At December 31, 2017, $6,001 $6,001

Note 6 - Definite-life Intangib

Note 6 - Definite-life Intangible Assets	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Intangible Assets Disclosure [Text Block]	NOTE 6 At June 30, 2018 December 31, 2017, $1,978 $3,349, two ten six June 30, 2018 2017 $1,371 $1,145, Year ending December 31, Amortization Expenses 2018 1,332 2019 646 Thereafter - $ 1,978

Note 7 - Lines of Credit

Note 7 - Lines of Credit	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Debt Disclosure [Text Block]	NOTE 7 In connection with certain orders, the Company may 94,620 $14,801 June 30, 2018) June 30, 2018, 94,620 $14,801 no

Note 8 - Leases

Note 8 - Leases	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Leases of Lessee Disclosure [Text Block]	NOTE 8 Operating Leases August 2018 March 2021. The future minimum lease payments for non-cancelable operating leases having remaining terms in excess of one June 30, 2018 Year ending December 31, Lease Payments 2018 247,498 2019 179,094 2020 182,676 2021 30,546 Thereafter - Total Minimum Lease Payments $ 639,814 Lease expense charged to operations was $361,150 $319,906 six June 30, 2018 2017, Capital Leases $586, July 2018 $10,950 The following represents future minimum capital lease payments as of June 30, 2018: Year ending December 31, Lease Payments 2018 11,536 Thereafter - Total minimum lease payments 11,536 Less amount representing interest (61 ) Present value of minimum lease payments 11,475 Less Current Portion (11,475 ) $ -

Note 9 - Agreements and Commitm

Note 9 - Agreements and Commitments	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Commitments and Contingencies Disclosure [Text Block]	NOTE 9 401 401 six June 30, 2018 2017, $5,706 $6,004, Contingencies may On September 9, 2014, 60% 40% €750,000 On July 31, 2018, 750,000, On December 20, 2017, $1,098,678 No In connection with certain orders, the Company may 94,620 $14,801 June 30, 2018) June 30, 2018, 94,620 $14,801 Product Warranties one three may In addition, the Company sells an extended warranty for certain systems, which generally provide 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, including deferred revenue on extended warranty contracts included in accrued expenses on the balance sheet, are as follows: 2018 Balance at December 31, 2017 $ 189,901 Current year warranty expense 84,770 Change in estimate related to pre-existing warranties - Payments made (53,059 ) Foreign currency effect (15,075 ) Balance at June 30, 2018 $ 206,537

Note 10 - Earnings Per Share

Note 10 - Earnings Per Share	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Earnings Per Share [Text Block]	NOTE 10 For the six June 30, 2018, 455,000 $0.74 $1.01 400,000 $1.65 not As of June 30, 2018, 855,000

Note 11 - Stockholders' Equity

Note 11 - Stockholders' Equity	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Stockholders' Equity Note Disclosure [Text Block]	NOTE 11 Common Stock 100,000,000 $0.001 June 30, 2018 December 31, 2017, 72,740,547 44,429,264 Voting one not Dividends -- may may Liquidation Rights -- Other Matters -- no no Preferred Stock -- one may may Parent has 10,000,000 $0.001 June 30, 2018 December 31, 2017, 0 2,200,837 Stock Issuances On April 16, 2018, 19,448,529 $0.34 $5,865,077. On January 2, 2018, 59,406 $60,000 June 30, 2018. On November 22, 2017, 2,200,837 1 4 8,803,348 $1.20 $2,641,004, $127,736. June 30, 2018, 2,200,837 4 8,803,348 . Common Stock Purchase Warrants A summary of the status of the warrants outstanding at June 30, 2018 Warrants Outstanding Warrants Exercisable Exercise Prices Number Weighted Weighted Exercise Number Weighted $ 1.65 400,000 1.07 $ 1.65 400,000 $ 1.65 Total 400,000 1.07 $ 1.65 400,000 $ 1.65 At June 30, 2018 2017, zero $0 $8,817 June 30, 2018 2017 The exercise price of the warrants and the number of shares underlying the warrants are subject to adjustment for stock dividends, subdivisions of the outstanding shares of common stock and combinations of the outstanding shares of common stock. For so long as the warrants remain outstanding, we are required to keep reserved from our authorized and unissued shares of common stock a sufficient number of shares to provide for the issuance of the shares underlying the warrants. Stock Options In August 2011, June 30, 2018, 455,000 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 $27,434 $44,641 six June 30, 2018 2017, June 30, 2018, $52,499 August 14, 2018. A summary of the status of the options outstanding under the Company’s stock option plans at June 30, 2018 Options Outstanding Options Exercisable Exercise Number Weighted Life (years) Weighted Number Weighted $ 0.74 325,000 2.12 $ 0.74 216,667 $ 0.74 $ 1.01 130,000 7.47 $ 1.01 130,000 $ 1.01 Total 455,000 3.65 $ 0.82 346,667 $ 0.84 A summary of the status of the options at June 30, 2018, June 30, 2018 Shares Weighted Average Weighted Outstanding at beginning of period 455,000 $ 0.82 4.15 $ - Granted - - - - Exercised - - - - Forfeited - - - - Expired - - - - Outstanding at end of period 455,000 $ 0.82 3.65 $ 1,495 Vested and expected to vest 455,000 $ 0.82 3.65 $ 1,495 Exercisable end of period 346,667 $ 0.84 4.13 $ 997 At June 30, 2018, 108,333 $0.74, $0.46, $52,499 The total intrinsic value of options at June 30, 2018 $1,495. June 30, 2018 (

Note 12 - Significant Customers

Note 12 - Significant Customers / Concentration / Disaggregated Revenue	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Segment Reporting Disclosure [Text Block]	NOTE 12 For the six June 30, 2018, 12% For the six June 30, 2017, two 17% 11% The Company sells products throughout the world; disaggregated revenue by geographical region is as follows for the three six June 30, 2018 2017: For the Three Months For the Six Months Ended June 30, Ended June 30, 2018 2017 2018 2017 United States and Canada $ 260,525 $ 337,372 $ 369,750 $ 564,168 Australia 82,490 109,445 282,793 287,181 South America 24,248 - 27,676 37,599 Asia 111,015 455,906 928,616 1,126,147 Europe 3,119,750 2,023,477 4,380,575 3,879,179 $ 3,598,028 $ 2,926,200 $ 5,989,410 $ 5,894,274 The Company’s disaggregated revenue by product line is as follows for the three six June 30, 2018 2017: For the Three Months For the Six Months Ended June 30, Ended June 30, 2018 2017 2018 2017 Ceramic diesel particulate $ 1,609,057 $ 1,873,910 $ 3,537,162 $ 4,157,084 Liquid filters and systems 1,988,971 996,890 2,452,248 1,616,963 Kiln furniture - 55,400 - 120,227 $ 3,598,028 $ 2,926,200 $ 5,989,410 $ 5,894,274 As of June 30, 2018, 90% 10% June 30, 2017, 86% 14%

Note 13 - Subsequent Events

Note 13 - Subsequent Events	6 Months Ended
	Jun. 30, 2018
Notes to Financial Statements
Subsequent Events [Text Block]	NOTE 13 The Company’s management reviewed material events through August 14, 2018. On July 2, 2018, On July 23, 2018, no On July 30, 2018, August 14, 2018. August 15, 2018.

Significant Accounting Policies

Significant Accounting Policies (Policies)	6 Months Ended
	Jun. 30, 2018
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. (“Parent”) and its subsidiaries. The terms "Company", “us", "we" and "our" as used in this report refer to Parent 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 Parent and each of its subsidiaries: LiqTech International, Inc., a Nevada corporation organized in July 2004, LiqTech USA, a Delaware corporation and a wholly-owned subsidiary of Parent formed in May 2011. LiqTech International AS, a Danish corporation, incorporated on January 15, 2000 ( LiqTech NA, Inc. (“LiqTech NA”), incorporated in Delaware on July 1, 2005, LiqTech Systems AS, a Danish Corporation ("LiqTech Systems") (Formerly Provital Solutions A/S) was incorporated on September 1, 2009 LiqTech Germany (“LiqTech Germany”) a 100% December 9, 2011, 2018. LiqTech PTE Ltd, (“LiqTech Sing”) a 95% January 19, 2012, 2018.
Consolidation, Policy [Policy Text Block]	Consolidation --
Foreign Currency Transactions and Translations Policy [Policy Text Block]	Functional Currency / Foreign currency translation -- three six June 30, 2018 2017.
Cash and Cash Equivalents, Policy [Policy Text Block]	Cash, Cash Equivalents and Restricted Cash -- three no June 30, 2018 December 31, 2017.
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 six June 30, 2018 December 31, 2017 2018 2017 Allowance for doubtful accounts at the beginning of the period $ 660,581 $ 2,128,452 Bad debt expense 0 (102,189 ) Receivables written off during the periods 0 (1,678,856 ) Effect of currency translation (19,006 ) 313,174 Allowance for doubtful accounts at the end of the period $ 641,575 $ 660,581
Inventory, Policy [Policy Text Block]	Inventory -- first first
Property, Plant and Equipment, Policy [Policy Text Block]	Property and Equipment -- three ten 4
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 Recognition, Policy [Policy Text Block]	Revenue Recognition and Sales Incentives Revenue Recognition -- Adoption of the new revenue standard: January 1, 2018, 606, 2015, 2016 2017 January 1, 2018. not not Accounting policy not not 25% not 9 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. Impairment losses recognized on receivables or contract assets were not six June 30, 2018. The customer generally arranges and pays for shipping activities. When the Company does arrange for shipping it is billed to the Customer. The Cost to prepare the product for shipment handling are paid by the Company and reported on the line “Cost of goods sold” in the unaudited consolidated statements of operations. System sales are recognized when the Company transfers control based upon signed acceptance of the system by the customer, upon shipment or upon final installation of the system based on the terms of the contract. For the majority of Liquid Membrane Filters and Diesel Particulate Filters, the Company transfers control and recognizes revenue when products are shipped to the customer according to the terms of the contract or purchase order. Aftermarket sales represent part sales, 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, which reflects the costs to perform under these contracts, which corresponds with, and thereby depicts the transfer of control to the customer. The Company has received long-term contracts for grants from government entities for 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. The two June 30, 2018 December 31, 2017 June 30, December 31, 2018 2017 Cost incurred on uncompleted contracts $ 3,073,380 $ 507,633 Estimated earnings 1,972,125 651,304 5,045,505 1,158,937 Billings on uncompleted contracts (4,179,430 ) (975,682 ) Contract asset (liabilities) $ 866,075 $ 183,255 June 30, December 31, 2018 2017 Contract assets $ 1,320,938 $ 490,100 Contract liabilities (454,863 ) (306,845 ) Net contract liabilities $ 866,075 $ 183,255 The Company’s disaggregated revenue is reported in Note 13.
Advertising Costs, Policy [Policy Text Block]	Advertising Cost -- $3,326 $4,197, six June 30, 2018 2017,
Research, Development, and Computer Software, Policy [Policy Text Block]	Research and Development Cost -- six June 30, 2018 2017 $345,677, $253,346,
Income Tax, Policy [Policy Text Block]	Income Taxes -- 740
Earnings Per Share, Policy [Policy Text Block]	Income (Loss) Per Share -- 260 not
Share-based Compensation, Option and Incentive Plans Policy [Policy Text Block]	Stock Options and Awards -- 11 718, $87,434 $125,958 $24,367 $24,650 six June 30, 2018 2017,
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 February 25, 2016, 2016 02, December 15, 2018. 8. Other recent accounting pronouncements issued by the FASB did not not

Note 1 - Summary of Significa21

Note 1 - Summary of Significant Accounting Policies (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Allowance for Credit Losses on Financing Receivables [Table Text Block]	2018 2017 Allowance for doubtful accounts at the beginning of the period $ 660,581 $ 2,128,452 Bad debt expense 0 (102,189 ) Receivables written off during the periods 0 (1,678,856 ) Effect of currency translation (19,006 ) 313,174 Allowance for doubtful accounts at the end of the period $ 641,575 $ 660,581
Contract with Customer, Asset and Liability [Table Text Block]	June 30, December 31, 2018 2017 Cost incurred on uncompleted contracts $ 3,073,380 $ 507,633 Estimated earnings 1,972,125 651,304 5,045,505 1,158,937 Billings on uncompleted contracts (4,179,430 ) (975,682 ) Contract asset (liabilities) $ 866,075 $ 183,255 June 30, December 31, 2018 2017 Contract assets $ 1,320,938 $ 490,100 Contract liabilities (454,863 ) (306,845 ) Net contract liabilities $ 866,075 $ 183,255

Note 3 - Inventory (Tables)

Note 3 - Inventory (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Inventory, Current [Table Text Block]	2018 2017 Furnace parts and supplies $ 353,800 $ 400,589 Raw materials 1,056,195 1,260,209 Work in process 2,525,039 2,123,418 Finished goods and filtration systems 1,862,421 2,297,743 Reserve for obsolescence (1,302,933 ) (1,420,093 ) Net Inventory $ 4,494,522 $ 4,661,866

Note 4 - Property and Equipme23

Note 4 - Property and Equipment (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Property, Plant and Equipment [Table Text Block]	Useful Life 2018 2017 Production equipment 3 - 10 $ 9,739,141 $ 10,114,398 Lab equipment 3 - 10 84,575 87,094 Computer equipment 3 - 5 201,700 204,553 Vehicles 3 - 5 63,322 75,312 Furniture and fixture 5 103,612 106,047 Leasehold improvements 10 1,053,880 1,076,731 11,246,230 11,664,135 Less Accumulated Depreciation (9,612,246 ) (9,704,930 ) Net Property and Equipment $ 1,633,984 $ 1,959,205

Note 5 - Investments at Costs (

Note 5 - Investments at Costs (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Fair Value, by Balance Sheet Grouping [Table Text Block]	As of June 30, 2018 Level 1 Level 2 Level 3 Investments - - 5,827 Total - - 5,827 As of December 31, 2017 Level 1 Level 2 Level 3 Investments - - 6,001 Total - - 6,001

Note 6 - Definite-life Intang25

Note 6 - Definite-life Intangible Assets (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block]	Year ending December 31, Amortization Expenses 2018 1,332 2019 646 Thereafter - $ 1,978

Note 8 - Leases (Tables)

Note 8 - Leases (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block]	Year ending December 31, Lease Payments 2018 247,498 2019 179,094 2020 182,676 2021 30,546 Thereafter - Total Minimum Lease Payments $ 639,814
Schedule of Future Minimum Lease Payments for Capital Leases [Table Text Block]	Year ending December 31, Lease Payments 2018 11,536 Thereafter - Total minimum lease payments 11,536 Less amount representing interest (61 ) Present value of minimum lease payments 11,475 Less Current Portion (11,475 ) $ -

Note 9 - Agreements and Commi27

Note 9 - Agreements and Commitments (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Product Warranty Liability [Table Text Block]	2018 Balance at December 31, 2017 $ 189,901 Current year warranty expense 84,770 Change in estimate related to pre-existing warranties - Payments made (53,059 ) Foreign currency effect (15,075 ) Balance at June 30, 2018 $ 206,537

Note 11 - Stockholders' Equity

Note 11 - Stockholders' Equity (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]	Warrants Outstanding Warrants Exercisable Exercise Prices Number Weighted Weighted Exercise Number Weighted $ 1.65 400,000 1.07 $ 1.65 400,000 $ 1.65 Total 400,000 1.07 $ 1.65 400,000 $ 1.65
Schedule of Share-based Compensation, Shares Authorized under Stock Option Plans, by Exercise Price Range [Table Text Block]	Options Outstanding Options Exercisable Exercise Number Weighted Life (years) Weighted Number Weighted $ 0.74 325,000 2.12 $ 0.74 216,667 $ 0.74 $ 1.01 130,000 7.47 $ 1.01 130,000 $ 1.01 Total 455,000 3.65 $ 0.82 346,667 $ 0.84
Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable [Table Text Block]	June 30, 2018 Shares Weighted Average Weighted Outstanding at beginning of period 455,000 $ 0.82 4.15 $ - Granted - - - - Exercised - - - - Forfeited - - - - Expired - - - - Outstanding at end of period 455,000 $ 0.82 3.65 $ 1,495 Vested and expected to vest 455,000 $ 0.82 3.65 $ 1,495 Exercisable end of period 346,667 $ 0.84 4.13 $ 997

Note 12 - Significant Custome29

Note 12 - Significant Customers / Concentration / Disaggregated Revenue (Tables)	6 Months Ended
	Jun. 30, 2018
Notes Tables
Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]	For the Three Months For the Six Months Ended June 30, Ended June 30, 2018 2017 2018 2017 United States and Canada $ 260,525 $ 337,372 $ 369,750 $ 564,168 Australia 82,490 109,445 282,793 287,181 South America 24,248 - 27,676 37,599 Asia 111,015 455,906 928,616 1,126,147 Europe 3,119,750 2,023,477 4,380,575 3,879,179 $ 3,598,028 $ 2,926,200 $ 5,989,410 $ 5,894,274
Reconciliation of Revenue from Segments to Consolidated [Table Text Block]	For the Three Months For the Six Months Ended June 30, Ended June 30, 2018 2017 2018 2017 Ceramic diesel particulate $ 1,609,057 $ 1,873,910 $ 3,537,162 $ 4,157,084 Liquid filters and systems 1,988,971 996,890 2,452,248 1,616,963 Kiln furniture - 55,400 - 120,227 $ 3,598,028 $ 2,926,200 $ 5,989,410 $ 5,894,274

Note 1 - Summary of Significa30

Note 1 - Summary of Significant Accounting Policies (Details Textual) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Cash, Uninsured Amount	$ 0		$ 0		$ 0
Value Added Tax Of Invoice, Percentage			25.00%
Advertising Expense			$ 3,326	$ 4,197
Research and Development Expense, Total	176,281	$ 114,010	345,677	253,346
Allocated Share-based Compensation Expense, Total	$ 9,161	$ 29,780	87,434	125,958
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense			$ 24,367	$ 24,650
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
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%

Note 1 - Summary of Significa31

Note 1 - Summary of Significant Accounting Policies - Allowance for Doubtful Accounts (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Allowance for doubtful accounts at the beginning of the period	$ 660,581	$ 2,128,452
Bad debt expense	0	(102,189)
Receivables written off during the periods	0	(1,678,856)
Effect of currency translation	(19,006)	313,174
Allowance for doubtful accounts at the end of the period	$ 641,575	$ 660,581

Note 1 - Summary of Significa32

Note 1 - Summary of Significant Accounting Policies - Summary of Changes in Contract Assets and Liabilities (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Cost incurred on uncompleted contracts	$ 3,073,380	$ 507,633
Estimated earnings	1,972,125	651,304
	5,045,505	1,158,937
Billings on uncompleted contracts	(4,179,430)	(975,682)
Contract asset (liabilities)	866,075	183,255
Contract assets	1,320,938	490,100
Contract liabilities	(454,863)	(306,845)
Net contract liabilities	$ 866,075	$ 183,255

Note 2 - Going Concern (Details

Note 2 - Going Concern (Details Textual) - USD ($)	Apr. 16, 2018	Apr. 30, 2018	Jun. 30, 2018	Jun. 30, 2017
Proceeds from Issuance of Common Stock	$ 5,865,077	$ 6,600,000	$ 6,612,500	$ 1,825,000
Stock Issued During Period, Shares, New Issues	19,448,529	19,448,529

Note 3 - Inventory - Summary of

Note 3 - Inventory - Summary of Inventory (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Furnace parts and supplies	$ 353,800	$ 400,589
Raw materials	1,056,195	1,260,209
Work in process	2,525,039	2,123,418
Finished goods and filtration systems	1,862,421	2,297,743
Reserve for obsolescence	(1,302,933)	(1,420,093)
Net Inventory	$ 4,494,522	$ 4,661,866

Note 4 - Property and Equipme35

Note 4 - Property and Equipment (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Depreciation, Total	$ 428,710	$ 502,131

Note 4 - Property and Equipme36

Note 4 - Property and Equipment - Summary of Property and Equipment (Details) - USD ($)	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Property and equipment, gross	$ 11,246,230	$ 11,664,135
Less Accumulated Depreciation	(9,612,246)	(9,704,930)
Net Property and Equipment	1,633,984	1,959,205
Production Equipment [Member]
Property and equipment, gross	9,739,141	10,114,398
Lab Equipment [Member]
Property and equipment, gross	84,575	87,094
Computer Equipment [Member]
Property and equipment, gross	201,700	204,553
Vehicles [Member]
Property and equipment, gross	$ 63,322	75,312
Furniture and Fixtures [Member]
Useful Life (Year)	5 years
Property and equipment, gross	$ 103,612	106,047
Leasehold Improvements [Member]
Useful Life (Year)	10 years
Property and equipment, gross	$ 1,053,880	$ 1,076,731
Minimum [Member]
Useful Life (Year)	3 years
Minimum [Member] | Production Equipment [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
Maximum [Member]
Useful Life (Year)	10 years
Maximum [Member] | Production Equipment [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

Note 5 - Investments at Costs37

Note 5 - Investments at Costs (Details Textual) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Other Long-term Investments	$ 5,827	$ 6,001
LEA Technology [Member]
Other Long-term Investments	$ 5,827	$ 6,001

Note 5 - Investments at Costs -

Note 5 - Investments at Costs - Financial Assets and Liabilities (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
Fair Value, Inputs, Level 1 [Member]
Investments
Total
Fair Value, Inputs, Level 2 [Member]
Investments
Total
Fair Value, Inputs, Level 3 [Member]
Investments	5,827	6,001
Total	$ 5,827	$ 6,001

Note 6 - Definite-life Intang39

Note 6 - Definite-life Intangible Assets (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Intangible Assets, Net (Excluding Goodwill), Total	$ 1,978		$ 3,349
Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	10 years
Patents [Member]
Amortization of Intangible Assets, Total	$ 1,371	$ 1,145
Patents [Member] | Minimum [Member]
Finite-Lived Intangible Asset, Useful Life	2 years
Patents [Member] | Maximum [Member]
Finite-Lived Intangible Asset, Useful Life	10 years

Note 6 - Definite-life Intang40

Note 6 - Definite-life Intangible Assets - Expected Future Amortization Expense (Details)	Jun. 30, 2018USD ($)
2,018	$ 1,332
2,019	646
Thereafter
	$ 1,978

Note 7 - Lines of Credit (Detai

Note 7 - Lines of Credit (Details Textual) - Jun. 30, 2018	USD ($)	DKK (kr)
Line of Credit Facility, Maximum Borrowing Capacity	$ 14,801	kr 94,620
Guarantor Obligations, Current Carrying Value	$ 14,801	kr 94,620

Note 8 - Leases (Details Textua

Note 8 - Leases (Details Textual) - USD ($)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Operating Leases, Rent Expense, Total	$ 361,150	$ 319,906
Capital Lease Obligations [Member]
Debt Instrument, Periodic Payment, Total	586
Debt Instrument, Periodic Payment Terms, Balloon Payment to be Paid	$ 10,950

Note 8 - Leases - Future Minimu

Note 8 - Leases - Future Minimum Lease Payments for Non-cancelable Operating Leases (Details)	Jun. 30, 2018USD ($)
2,018	$ 247,498
2,019	179,094
2,020	182,676
2,021	30,546
Thereafter
Total Minimum Lease Payments	$ 639,814

Note 8 - Leases - Future Mini44

Note 8 - Leases - Future Minimum Capital Lease Payments (Details) - USD ($)	Jun. 30, 2018	Dec. 31, 2017
2,018	$ 11,536
Thereafter	0
Total minimum lease payments	11,536
Less amount representing interest	(61)
Present value of minimum lease payments	11,475
Less Current Portion	$ (11,475)	$ (26,186)

Note 9 - Agreements and Commi45

Note 9 - Agreements and Commitments (Details Textual)	Dec. 20, 2017USD ($)	Sep. 09, 2014EUR (€)	Jun. 30, 2018USD ($)	Jun. 30, 2017USD ($)	Jun. 30, 2018DKK (kr)
Defined Contribution Plan, Cost			$ 5,706	$ 6,004
Line of Credit Facility, Maximum Borrowing Capacity			14,801		kr 94,620
Guarantor Obligations, Current Carrying Value			$ 14,801		kr 94,620
Minimum [Member]
Standard Product Warranty, Term			1 year
Maximum [Member]
Standard Product Warranty, Term			3 years
Extended Product Warranty, Term			4 years
Customer Dispute, Installation of Water Treatment Systems [Member]
Loss Contingency, Damages Sought, Value	$ 1,098,678
Chief Executive Officer [Member] | LiqTech Italy [Member]
Equity Method Investment, Ownership Percentage		60.00%
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners		40.00%
Loss Contingency, Damages Sought, Value | €		€ 750,000

Note 9 - Agreements and Commi46

Note 9 - Agreements and Commitments - Product Warranties (Details)	6 Months Ended
	Jun. 30, 2018USD ($)
Balance	$ 189,901
Current year warranty expense	84,770
Change in estimate related to pre-existing warranties
Payments made	(53,059)
Foreign currency effect	(15,075)
Balance	$ 206,537

Note 10 - Earnings Per Share (D

Note 10 - Earnings Per Share (Details Textual) - $ / shares	6 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 0.82	$ 0.82
Class of Warrant or Right, Exercise Price of Warrants or Rights	1.65
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	0.74
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price, Ending Balance	$ 1.01
Employee Stock Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	455,000
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	400,000
Employee Stock Options and Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	855,000

Note 11 - Stockholders' Equit48

Note 11 - Stockholders' Equity (Details Textual) - USD ($)	Apr. 16, 2018	Jan. 02, 2018	Nov. 22, 2017	Apr. 30, 2018	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Common Stock, Shares Authorized					100,000,000		100,000,000		100,000,000
Common Stock, Par or Stated Value Per Share					$ 0.001		$ 0.001		$ 0.001
Common Stock, Shares, Issued, Total					72,740,547		72,740,547		44,429,264
Preferred Stock, Shares Authorized					10,000,000		10,000,000		10,000,000
Preferred Stock, Par or Stated Value Per Share					$ 0.001		$ 0.001		$ 0.001
Preferred Stock, Shares Issued, Total					2,200,837		2,200,837		2,200,837
Stock Issued During Period, Shares, New Issues	19,448,529			19,448,529
Share Price	$ 0.34
Proceeds from Issuance of Common Stock	$ 5,865,077			$ 6,600,000			$ 6,612,500	$ 1,825,000
Payments of Stock Issuance Costs							$ 747,423
Class of Warrant or Right, Outstanding, Non-vested Warrants					0	0	0	0
Allocated Share-based Compensation Expense, Total					$ 9,161	$ 29,780	$ 87,434	$ 125,958
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance					455,000		455,000		455,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options					$ 52,499		$ 52,499
Share-based Compensation Arrangement by Share-based Payment Award, Options, Nonvested, Number of Shares, Ending Balance					108,333		108,333
Share Based Compensation Arrangements by Share Based Payment Award Options, Nonvested Weighted Average Exercise Price							$ 0.74
Share-based Compensation Arrangement by Share-based Payment Award, Option, Nonvested, Weighted Average Exercise Price, Ending Balance					$ 0.46		$ 0.46
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Intrinsic Value					$ 1,495		$ 1,495
Preferred Stock, Shares Outstanding, Ending Balance					2,200,837		2,200,837		2,200,837
The 2011 Stock Options Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number, Ending Balance					455,000		455,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options					$ 52,499		$ 52,499
Warrants [Member]
Allocated Share-based Compensation Expense, Total							0	8,817
Employee Stock Option [Member] | The 2011 Stock Options Plan [Member]
Allocated Share-based Compensation Expense, Total							$ 27,434	$ 44,641
Director [Member]
Stock Issued During Period, Shares, Restricted Stock Award, Gross		59,406
Stock Issued During Period, Value, Restricted Stock Award, Gross		$ 60,000
Convertible Preferred Stock [Member]
Preferred Stock, Shares Authorized					10,000,000		10,000,000
Preferred Stock, Par or Stated Value Per Share					$ 0.001		$ 0.001
Preferred Stock, Shares Issued, Total					0		0		2,200,837
Convertible Preferred Stock, Aggregate Shares Issued upon Conversion			8,803,348				8,803,348
Preferred Stock, Shares Outstanding, Ending Balance					0		0		2,200,837
Convertible Preferred Stock [Member] | Private Placement [Member]
Stock Issued During Period, Shares, New Issues			2,200,837				2,200,837
Convertible Preferred Stock, Shares Issued upon Conversion			4		4		4
Proceeds from Issuance of Private Placement			$ 2,641,004
Payments of Stock Issuance Costs			$ 127,736

Note 11 - Stockholders' Equit49

Note 11 - Stockholders' Equity - Warrants Outstanding by Exercise Price (Details)	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Exercise prices of warrants (in dollars per share)	$ 1.65
Warrants outstanding (in shares) | shares	400,000
Warrants outstanding, weighted average remaining contractual life (Year)	1 year 25 days
Warrants outstanding, weighted average exercise price (in dollars per share)	$ 1.65
Warrants exercisable (in shares) | shares	400,000
Warrants exercisable, weighted average exercise price (in dollars per share)	$ 1.65
Warrant 1 [Member]
Exercise prices of warrants (in dollars per share)	$ 1.65
Warrants outstanding (in shares) | shares	400,000
Warrants outstanding, weighted average remaining contractual life (Year)	1 year 25 days
Warrants outstanding, weighted average exercise price (in dollars per share)	$ 1.65
Warrants exercisable (in shares) | shares	400,000
Warrants exercisable, weighted average exercise price (in dollars per share)	$ 1.65

Note 11 - Stockholders' Equit50

Note 11 - Stockholders' Equity - Options Outstanding by Exercise Price (Details)	6 Months Ended
	Jun. 30, 2018$ / sharesshares
Options outstanding (in shares) | shares	455,000
Options outstanding, weighted average remaining contractual life (Year)	3 years 237 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 0.82
Options exercisable (in shares) | shares	346,667
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.84
Price Range 1 [Member]
Exercise prices of options (in dollars per share)	$ 0.74
Options outstanding (in shares) | shares	325,000
Options outstanding, weighted average remaining contractual life (Year)	2 years 43 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 0.74
Options exercisable (in shares) | shares	216,667
Options exercisable, weighted average exercise price (in dollars per share)	$ 0.74
Price Range 2 [Member]
Exercise prices of options (in dollars per share)	$ 1.01
Options outstanding (in shares) | shares	130,000
Options outstanding, weighted average remaining contractual life (Year)	7 years 171 days
Options outstanding, weighted average exercise price (in dollars per share)	$ 1.01
Options exercisable (in shares) | shares	130,000
Options exercisable, weighted average exercise price (in dollars per share)	$ 1.01

Note 11 - Stockholders' Equit51

Note 11 - Stockholders' Equity - Status of Options and Changes During the Year (Details) - USD ($)	6 Months Ended	12 Months Ended
	Jun. 30, 2018	Dec. 31, 2017
Outstanding, shares (in shares)	455,000
Outstanding, weighted average exercise price (in dollars per share)	$ 0.82
Outstanding, average remaining life (Year)	3 years 237 days	4 years 54 days
Granted, shares (in shares)
Granted, weighted average exercise price (in dollars per share)
Exercised, shares (in shares)
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)	455,000	455,000
Outstanding, weighted average exercise price (in dollars per share)	$ 0.82	$ 0.82
Outstanding, weighted average intrinsic value	$ 1,495
Vested and expected to vest, shares (in shares)	455,000
Vested and expected to vest, weighted average exercise price (in dollars per share)	$ 0.82
Vested and expected to vest, average remaining life (Year)	3 years 237 days
Vested and expected to vest, weighted average intrinsic value	$ 1,495
Exercisable end of period, shares (in shares)	346,667
Exercisable end of period, weighted average exercise price (in dollars per share)	$ 0.84
Exercisable end of period, average remaining life (Year)	4 years 47 days
Exercisable end of period, weighted average intrinsic value	$ 997

Note 12 - Significant Custome52

Note 12 - Significant Customers / Concentration / Disaggregated Revenue (Details Textual)	6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017
Customer Concentration Risk [Member] | Sales Revenue, Net [Member]
Concentration Risk, Percentage	12.00%
Number of Major Customers		2
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Major Customer 1 [Member]
Concentration Risk, Percentage		17.00%
Customer Concentration Risk [Member] | Sales Revenue, Net [Member] | Major Customer 2 [Member]
Concentration Risk, Percentage		11.00%
Geographic Concentration Risk [Member] | Assets, Total [Member] | DENMARK
Concentration Risk, Percentage	90.00%	86.00%
Geographic Concentration Risk [Member] | Assets, Total [Member] | UNITED STATES
Concentration Risk, Percentage	10.00%	14.00%

Note 12 - Significant Custome53

Note 12 - Significant Customers / Concentration / Disaggregated Revenue - Net Sales by Geographical Region (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Sales	$ 3,598,028	$ 2,926,200	$ 5,989,410	$ 5,894,274
Reportable Geographical Components [Member] | US And Canada [Member]
Net Sales	260,525	337,372	369,750	564,168
Reportable Geographical Components [Member] | AUSTRALIA
Net Sales	82,490	109,445	282,793	287,181
Reportable Geographical Components [Member] | South America [Member]
Net Sales	24,248		27,676	37,599
Reportable Geographical Components [Member] | Asia [Member]
Net Sales	111,015	455,906	928,616	1,126,147
Reportable Geographical Components [Member] | Europe [Member]
Net Sales	$ 3,119,750	$ 2,023,477	$ 4,380,575	$ 3,879,179

Note 12 - Significant Custome54

Note 12 - Significant Customers / Concentration / Disaggregated Revenue - Sales by Product Line (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Net Sales	$ 3,598,028	$ 2,926,200	$ 5,989,410	$ 5,894,274
Ceramic Diesel Particulate [Member]
Net Sales	1,609,057	1,873,910	3,537,162	4,157,084
Liquid Filters [Member]
Net Sales	1,988,971	996,890	2,452,248	1,616,963
Kiln Furniture [Member]
Net Sales		$ 55,400		$ 120,227