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Properties, Plant and Equipment (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2016
Jun. 30, 2015
Jun. 30, 2016
Jun. 30, 2015
Dec. 31, 2015
Property, Plant and Equipment [Abstract]          
Land and equipment sold, book value     $ 2,400,000    
Gain on sale of properties, plant, and equipment     583,462 $ (77,579)  
Note receivable on sale of land and equipment $ 700,000   700,000    
Depreciation expense 1,600,000 $ 3,200,000 1,500,000 $ 2,900,000  
Assets held-for-sale $ 4,297,926   $ 4,297,926   $ 0