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Note 1 - Summary of Significant Accounting Policies (Tables)

9 Months Ended

Sep. 30, 2023

Notes Tables

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

		September 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			(10,322	)			(295,778	)
Effect of currency translation			(328	)			(29,205	)
Allowance for doubtful accounts at the end of the period		$	48,909			$	59,559

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,
		2023				2022				2023				2022
Americas		$	986,316			$	382,573			$	1,798,608			$	861,260
Asia-Pacific			891,058				895,696				2,031,013				2,944,449
Europe			2,933,092				1,903,930				8,944,536				6,651,065
Middle East & Africa			259,980				123,335				1,297,827				1,504,288
		$	5,070,446			$	3,305,534			$	14,071,984			$	11,961,062

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

		For the Three Months								For the Nine Months
		Ended September 30,								Ended September 30,
		2023				2022				2023				2022
Water		$	2,629,910			$	785,046			$	6,135,127			$	3,522,049
Ceramics			1,608,763				1,854,981				4,807,600				5,548,951
Plastics			656,693				665,507				2,951,376				2,839,809
Corporate			175,080				-				177,881				50,253
		$	5,070,446			$	3,305,534			$	14,071,984			$	11,961,062

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

		September 30, 2023				December 31, 2022
Cost incurred		$	4,176,466			$	3,860,179
Unbilled project deliveries			941,767				950,105
VAT			242,831				229,006
Other receivables			107,607				45,814
Prepayments			(3,357,497	)			(3,363,039	)
Deferred Revenue			(63,930	)			(118,327	)
		$	2,047,244			$	1,603,738
Distributed as follows:
Contract assets		$	2,587,397			$	2,253,295
Contract liabilities			(540,153	)			(649,557	)

X

- Definition

Tabular disclosure of allowance for credit loss on financing receivable.

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