Quarterly report pursuant to Section 13 or 15(d)

Property, Plant and Equipment, net

v3.21.2
Property, Plant and Equipment, net
 9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment, net Property, Plant and Equipment, net
Property, plant and equipment at September 30, 2021 and December 31, 2020 consisted of the following:
Estimated Useful
Life (in Years)		 September 30, 2021 December 31, 2020
Energy systems
1 - 15 years
 $ 3,556,488  $ 3,526,514 
Machinery and equipment
5 - 7 years
 1,484,790  1,448,024 
Furniture and fixtures
5 years
 193,698  193,698 
Computer software
3 - 5 years
 192,865  192,865 
Leasehold improvements * 450,791  450,792 
    5,878,632  5,811,893 
Less - accumulated depreciation and amortization   (3,961,149) (3,528,047)
  $ 1,917,483  $ 2,283,846 
* Lesser of estimated useful life of asset or lease term
Depreciation and amortization expense on property and equipment for the three and nine months ended September 30, 2021 and 2020 was $144,181 and $450,195 and $175,869 and $527,886, respectively.