Annual report pursuant to Section 13 and 15(d)

Property, plant and equipment

Property, plant and equipment

12 Months Ended

Dec. 31, 2020

Property, Plant and Equipment [Abstract]

Property, plant and equipment at December 31, 2020 and 2019 consisted of the following:


	Estimated Useful Life (in Years)	2020		2019
Energy systems	10 - 15 years	$	3,526,514	$	4,372,638
Machinery and equipment	5 - 7 years	1,448,024		1,462,208
Furniture and fixtures	5 years	193,698		193,698
Computer software	3 - 5 years	192,865		192,865
Leasehold improvements	*	450,792		450,792
		5,811,893		6,672,201
Less - accumulated depreciation and amortization		(3,528,047)		(3,206,253)
Net property, plant and equipment		$	2,283,846	$	3,465,948

* Lesser of estimated useful life of asset or lease term

Depreciation and amortization expense on property and equipment for the years ended December 31, 2020 and 2019 was $702,113 and $847,622, respectively.

During the year ended December 31, 2020, we determined that certain of the ADGE customer contracts terminated due to the customers failure to perform their obligations pursuant to the contractual agreements and deemed the assets related to the contracts at these sites to be impaired. We recorded a non-cash impairment of $524,972 which is included in the Consolidated Statement of Operations for the year ended December 31, 2020, within long-lived asset impairment.

In March 2019, we sold certain energy systems related assets and related energy production contracts. See Note 5."Sale of Energy Producing Assets and Goodwill Impairment" for further discussion.