Annual report pursuant to Section 13 and 15(d)

INVENTORIES (Details)

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INVENTORIES (Details) - USD ($)
Dec. 31, 2020
Dec. 31, 2019
INVENTORIES    
Work in process $ 1,189,000 $ 810,000
Finished goods 449,000 544,000
Total 1,638,000 1,354,000
Advance payments for raw materials $ 4,000,000.0 $ 3,000,000.0