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Note 9 - Inventories, Net of Continuing Operations (Details) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Raw materials $ 1,555,838 $ 1,544,949
Work in process 3,171,759 3,110,296
Finished goods 8,431,874 9,766,060
In Transit 92,671 99,923
Allowance for excess quantities (565,499) (561,729)
Total inventories $ 12,686,643 $ 13,959,499