XML 23 R12.htm IDEA: XBRL DOCUMENT v3.24.3
Note 5 - Inventories
9 Months Ended
Sep. 30, 2024
Notes to Financial Statements  
Inventory Disclosure [Text Block]

NOTE 5 INVENTORIES

 

Inventories consisted of the following on September 30, 2024, and December 31, 2023:

 

  

September 30,

  

December 31,

 
  

2024

  

2023

 

Furnace parts and supplies

 $23,950  $55,177 

Raw materials

  3,272,852   3,301,526 

Work in process

  2,397,553   1,271,458 

Finished goods and filtration systems

  1,699,003   1,507,113 

Reserve for obsolescence

  (1,129,745)  (867,458)

Total inventories, net

 $6,263,613  $5,267,816 

 

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.