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Property and Equipment (Details) - USD ($)
Mar. 31, 2018
Dec. 31, 2017
Property and equipment    
Less: accumulated depreciation and amortization $ (2,468,687) $ (2,288,749)
Property and equipment, net 2,377,323 2,197,039
Furniture and Equipment    
Property and equipment    
Property and equipment, gross 1,708,519 1,934,669
Leasehold Improvements    
Property and equipment    
Property and equipment, gross 1,127,430 711,319
Processing Equipment    
Property and equipment    
Property and equipment, gross $ 2,010,061 $ 1,839,800