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Note 5 - Inventories (Tables)

6 Months Ended

Jun. 30, 2024

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		June 30, 2024				December 31, 2023
Furnace parts and supplies		$	45,789			$	55,177
Raw materials			3,329,036				3,301,526
Work in process			1,647,283				1,271,458
Finished goods and filtration systems			1,627,439				1,507,113
Reserve for obsolescence			(939,300	)			(867,458	)
Total inventories, net		$	5,620,247			$	5,267,816

X

- Definition

Tabular disclosure of the carrying amount as of the balance sheet date of merchandise, goods, commodities, or supplies held for future sale or to be used in manufacturing, servicing or production process.

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