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Note 1 - Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2023

Notes Tables

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

		2023				2022
Allowance for doubtful accounts at the beginning of the period		$	59,559			$	409,076
Bad debt expense			82,066				(24,534	)
Receivables written off during the periods			(10,298	)			(295,778	)
Effect of currency translation			3,585				(29,205	)
Allowance for doubtful accounts at the end of the period		$	134,912			$	59,559

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

		% Distribution								For the Year Ended December 31
		2023				2022				2023				2022
Americas			12	%			7	%		$	2,125,460			$	1,073,433
Asia-Pacific			14	%			21	%			2,506,215				3,406,420
Europe			65	%			59	%			11,820,674				9,379,337
Middle East & Africa			9	%			13	%			1,549,303				2,123,248
			100	%			100	%		$	18,001,652			$	15,982,438

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

		% Distribution								For the Year Ended December 31
		2023				2022				2023				2022
Water			42	%			33	%		$	7,705,080			$	5,297,286
Ceramics			35	%			43	%			6,232,628				6,844,861
Plastics			21	%			22	%			3,736,529				3,528,606
Corporate			2	%			2	%			327,415				311,685
			100	%			100	%		$	18,001,652			$	15,982,438

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

		2023				2022
Cost incurred		$	3,225,728			$	3,860,179
Unbilled project deliveries			582,557				950,105
VAT			329,980				229,006
Other receivables			92,619				45,814
Prepayments			(1,688,427	)			(3,363,039	)
Deferred Revenue			(33,360	)			(118,327	)
		$	2,509,097			$	1,603,738
Distributed as follows:
Contract assets		$	2,891,744			$	2,253,295
Contract liabilities			(382,647	)			(649,557	)
		$	2,509,097			$	1,603,738

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Tabular disclosure of allowance for credit loss on financing receivable.

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