v3.26.1
Inventories (Details) - USD ($)
Mar. 31, 2026
Dec. 31, 2025
Inventory Disclosure [Abstract]    
Raw materials and manufacturing supplies $ 6,696,000 $ 6,423,000
Finished products 1,867,000 1,808,000
Total inventories 8,563,000 8,231,000
Inventory valuation reserves $ 0 $ 0