Property, Plant and Equipment, net (Property, Plant and Equipment, net) (Details) - USD ($)	6 Months Ended
	Jun. 30, 2017	Dec. 31, 2016
Property, Plant and Equipment
Total property, plant and equipment	$ 23,061,064	$ 22,631,605
Less: accumulated depreciation	(16,664,482)	(16,190,694)
Property, plant and equipment, net	6,396,582	6,440,911
Machinery and Equipment [Member]
Property, Plant and Equipment
Total property, plant and equipment	17,322,498	16,647,302
Building and improvements, maximum
Property, Plant and Equipment
Total property, plant and equipment	3,986,715	3,986,715
Vehicles, maximum
Property, Plant and Equipment
Total property, plant and equipment	90,713	90,713
Furniture, fixtures, computers and software, maximum
Property, Plant and Equipment
Total property, plant and equipment	1,538,316	1,504,776
Construction in Progress [Member]
Property, Plant and Equipment
Total property, plant and equipment	$ 122,822	$ 402,099
Maximum asset life (years) | Machinery and Equipment [Member]
Property, Plant and Equipment
Asset Lives (in years)	15 years
Maximum asset life (years) | Building and improvements, maximum
Property, Plant and Equipment
Asset Lives (in years)	25 years
Maximum asset life (years) | Vehicles, maximum
Property, Plant and Equipment
Asset Lives (in years)	5 years
Maximum asset life (years) | Furniture, fixtures, computers and software, maximum
Property, Plant and Equipment
Asset Lives (in years)	5 years
Minimum asset life (years) | Machinery and Equipment [Member]
Property, Plant and Equipment
Asset Lives (in years)	3 years
Minimum asset life (years) | Building and improvements, maximum
Property, Plant and Equipment
Asset Lives (in years)	5 years
Minimum asset life (years) | Vehicles, maximum
Property, Plant and Equipment
Asset Lives (in years)	3 years
Minimum asset life (years) | Furniture, fixtures, computers and software, maximum
Property, Plant and Equipment
Asset Lives (in years)	3 years