Note 6 - Inventories

3 Months Ended

Mar. 31, 2026

Notes to Financial Statements

Inventory Disclosure [Text Block]

NOTE 6– INVENTORIES

Inventories consisted of the following on March 31, 2026, and December 31, 2025:

		*March 31,*				*December 31,*
		*2026*				*2025*
Raw materials		$	3,671,510			$	3,282,184
Work in process			2,267,951				2,402,158
Finished goods and filtration systems			1,438,643				1,755,674
Reserve for obsolescence			(899,990	)			(960,695	)
Total inventories, net		$	6,478,114			$	6,479,321

Inventory valuation adjustments for excess and obsolete inventory are calculated based on current inventory levels, movements, expected useful lives, and estimated future demand for the products.