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Inventories (Details) - USD ($)
Jun. 30, 2025
Dec. 31, 2024
Inventories    
Finished goods $ 182,000 $ 165,000
Work-in-process 1,333,000 2,235,000
Raw materials and packaging supplies 5,182,000 10,970,000
Inventories $ 6,697,000 $ 13,370,000