Inventories (Schedule of Inventories) (Details) - USD ($)	Mar. 31, 2016	Dec. 31, 2015
Inventory Disclosure [Abstract]
Raw materials	$ 121,720,839	$ 110,683,958
Work-in-process	30,324,061	27,077,220
Finished goods	36,579,876	36,934,233
Total Inventory	$ 188,624,776	$ 174,695,411	[1]

[1] Note: The condensed consolidated balance sheet at December 31, 2015 has been derived from the audited financial statements at that date but does not include all of the information and footnotes required by accounting principles generally accepted in the United States for complete financial statements.