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Note 1 - Summary of Significant Accounting Policies - Sales by Product Line (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue	$ 5,070,446	$ 3,305,534	$ 14,071,984	$ 11,961,062
Water Segment [Member]
Revenue	2,629,910	785,046	6,135,127	3,522,049
Ceramics Segment [Member]
Revenue	1,608,763	1,854,981	4,807,600	5,548,951
Plastics Segment [Member]
Revenue	656,693	665,507	2,951,376	2,839,809
Corporate Segment [Member]
Revenue	$ 175,080	$ 0	$ 177,881	$ 50,253

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Amount, including tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value-added and excise.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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