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Note 1 - Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2023

Notes Tables

Financing Receivable, Allowance for Credit Loss [Table Text Block]

		June 30, 2023				December 31, 2022
Allowance for doubtful accounts at the beginning of the period		$	59,559			$	409,076
Bad debt expense			-				(24,534	)
Receivables written off during the periods			(10,299	)			(295,778	)
Effect of currency translation			970				(29,205	)
Allowance for doubtful accounts at the end of the period		$	50,230			$	59,559

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,
		2023				2022				2023				2022
Americas		$	441,186			$	339,380			$	774,717			$	478,688
Asia-Pacific			650,095				1,213,389				1,101,989				2,048,753
Europe			3,119,496				2,084,570				6,219,282				4,747,134
Middle East & Africa			779,242				1,380,953				905,550				1,380,953
		$	4,990,019			$	5,018,292			$	9,001,538			$	8,655,528

Reconciliation of Revenue from Segments to Consolidated [Table Text Block]

		For the Three Months								For the Six Months
		Ended June 30,								Ended June 30,
		2023				2022				2023				2022
Water		$	2,070,298			$	2,144,011			$	3,505,217			$	2,737,002
Ceramics			1,789,465				1,812,334				3,198,837				3,692,452
Plastics			1,127,455				1,035,705				2,294,683				2,174,302
Corporate			2,801				26,242				2,801				51,772
		$	4,990,019			$	5,018,292			$	9,001,538			$	8,655,528

Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block]

		June 30, 2023				December 31, 2022
Cost incurred		$	4,018,416			$	3,860,179
Unbilled project deliveries			639,790				950,105
VAT			448,695				229,006
Other receivables			96,919				45,814
Prepayments			(3,620,906	)			(3,363,039	)
Deferred Revenue			(54,713	)			(118,327	)
		$	1,528,201			$	1,603,738
Distributed as follows:
Contract assets		$	2,406,402			$	2,253,295
Contract liabilities			(878,201	)			(649,557	)
		$	1,528,201			$	1,603,738

X

- Definition

Tabular disclosure of allowance for credit loss on financing receivable.

+ References

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-Topic 326
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
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+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Section 50
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