Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment - Summary of Property and Equipment (Details)

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Property, Plant and Equipment - Summary of Property and Equipment (Details) - USD ($)
 9 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 14,691,916 $ 1,691,523
Less - accumulated depreciation and amortization (2,017,401) (1,174,380)
Property and equipment, net, before construction in progress 12,674,515 517,143
Construction in progress 2,828,459 0
Property and equipment, net 15,502,974 517,143
Energy systems    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 12,823,745 0
Energy systems | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life - years 1 year  
Energy systems | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life - years 15 years  
Machinery and equipment    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 1,127,264 1,009,893
Machinery and equipment | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life - years 5 years  
Machinery and equipment | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life - years 7 years  
Furniture and fixtures    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 103,971 141,874
Useful life - years 5 years  
Computer software    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 196,417 102,415
Computer software | Minimum    
Property, Plant and Equipment [Line Items]    
Useful life - years 3 years  
Computer software | Maximum    
Property, Plant and Equipment [Line Items]    
Useful life - years 5 years  
Leasehold improvements    
Property, Plant and Equipment [Line Items]    
Property and equipment, gross $ 440,519 $ 437,341