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Inventories (Schedule of Inventories) (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Inventory Disclosure [Abstract]    
Raw materials and work in process $ 19,345,723 $ 18,378,450
Consigned inventory 416,468 937,006
Finished goods, net of reserve 4,664,055 6,216,965
Total inventories 24,426,246 25,532,421
less non-current inventories (15,554,992) (15,749,000)
Total inventories $ 8,871,254 $ 9,783,421