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Note 1 - Summary of Significant Accounting Policies (Tables)

3 Months Ended

Mar. 31, 2023

Notes Tables

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

		March 31, 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			-				(295,778	)
Effect of currency translation			1,069				(29,205	)
Allowance for doubtful accounts at the end of the period		$	60,628			$	59,559

Schedule of Revenue from External Customers Attributed to Foreign Countries by Geographic Area [Table Text Block]

										For the Three months
		% Distribution								Ended March 31,
		2023				2022				2023				2022
Americas			9	%			4	%		$	333,530			$	139,307
Asia-Pacific			11	%			23	%			451,895				835,365
Europe			77	%			73	%			3,099,785				2,662,564
Middle East & Africa			3	%			-	%			126,309				-
			100	%			100	%		$	4,011,519			$	3,637,236

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

										For the Three Months
		% Distribution								Ended March 31,
		2023				2022				2023				2022
Water			36	%			16	%		$	1,434,919			$	592,990
Ceramics			35	%			52	%			1,409,372				1,880,118
Plastics			29	%			31	%			1,167,228				1,138,597
Corporate			-	%			1	%			-				25,530
			100	%			100	%		$	4,011,519			$	3,637,236

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

		March 31, 2023				December 31, 2022
Cost incurred		$	4,338,453			$	3,860,179
Unbilled project deliveries			506,509				950,105
VAT			327,718				229,006
Other receivables			75,804				45,814
Prepayments			(3,445,720	)			(3,363,039	)
Deferred Revenue			(65,701	)			(118,327	)
		$	1,737,063			$	1,603,738
Distributed as follows:
Contract assets		$	2,447,668			$	2,253,295
Contract liabilities			(710,604	)			(649,557	)
		$	1,737,063			$	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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