Annual report pursuant to Section 13 and 15(d)

Property, plant and equipment

v3.8.0.1
Property, plant and equipment
 12 Months Ended
Dec. 31, 2017
Property, Plant and Equipment [Abstract]  
Property, plant and equipment
Property, plant and equipment
Property, plant and equipment at December 31, 2017 and 2016 consisted of the following:
 
Estimated Useful
Life (in Years)
 
2017
 
2016
Energy systems
1 - 15 years
 
$
12,466,642

 
$
—

Machinery and equipment
5 - 7 years
 
1,215,951

 
1,009,893

Furniture and fixtures
5 years
 
205,320

 
141,874

Computer software
3 - 5 years
 
115,253

 
102,415

Leasehold improvements
*
 
440,519

 
437,341

 
 
 
14,443,685

 
1,691,523

Less - accumulated depreciation and amortization
 
 
(2,177,974
)
 
(1,174,380
)
Net property, plant and equipment
 
 
$
12,265,711

 
$
517,143


* Lesser of estimated useful life of asset or lease term
Depreciation and amortization expense on property and equipment for the years ended December 31, 2017 and 2016 was $1,114,540 and $165,695, respectively.