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Note 1 - Summary of Significant Accounting Policies - Sales by Product Line (Details) - USD ($)	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenue, Percentage	100.00%	100.00%
Revenue	$ 4,235,344	$ 4,011,519
Water Segment [Member]
Revenue, Percentage	37.00%	36.00%
Revenue	$ 1,548,666	$ 1,434,919
Ceramics Segment [Member]
Revenue, Percentage	42.00%	35.00%
Revenue	$ 1,806,336	$ 1,409,372
Plastics Segment [Member]
Revenue, Percentage	21.00%	29.00%
Revenue	$ 880,342	$ 1,167,228
Corporate Segment [Member]
Revenue, Percentage	0.00%	0.00%
Revenue	$ 0	$ 0

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