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Inventories
6 Months Ended
Jun. 30, 2019
Inventory Disclosure [Abstract]  
Inventories Inventories
Inventories consisted of the following at the respective balance sheet dates:
June 30, 2019December 31, 2018
Raw materials
$146,975,452 $139,058,541 
Work-in-process
31,237,909 35,386,615 
Finished goods
46,881,102 50,836,443 
Total Inventory
$225,094,463 $225,281,599