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Inventories
 3 Months Ended
Mar. 31, 2017
Inventory Disclosure [Abstract]  
Inventories
Inventories
Inventories consisted of the following at the respective balance sheet dates:
 
March 31, 2017
 
December 31, 2016
Raw materials
$
122,534,856

 
$
115,099,569

Work-in-process
33,896,522

 
32,509,368

Finished goods
40,656,873

 
41,702,500

Total Inventory
$
197,088,251

 
$
189,311,437