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Note 4 - Inventory (Tables)

12 Months Ended

Dec. 31, 2022

Notes Tables

Schedule of Inventory, Current [Table Text Block]

		2022				2021
Furnace parts and supplies		$	66,495			$	213,224
Raw materials			2,474,227				2,144,067
Work in process			982,973				1,671,290
Finished goods and filtration systems			1,201,533				1,660,916
Reserve for excess and obsolescence			(663,227	)			(268,470	)
Net Inventory		$	4,062,001			$	5,421,027

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.

+ References

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-Name Accounting Standards Codification
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