Annual report pursuant to Section 13 and 15(d)

Segments (Notes)

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Segments (Notes)
 12 Months Ended
Dec. 31, 2021
Segment Reporting [Abstract]  
Segments Segments
As of December 31, 2021, we were organized into three operating segments through which senior management evaluates our business. These segments, as described in more detail in Note 1, are organized around the products and services provided to customers and represent our reportable segments. Prior to the acquisition of ADGE (see Note 4. "Acquisition of American DG Energy Inc."), our operations consisted of a single segment. The following table presents information by reportable segment for the years ended December 31, 2021 and 2020:
 Products and Services Energy Production Corporate, other and elimination (1) Total
Year ended December 31, 2021
Revenue - external customers $ 22,658,923  $ 1,739,150  $ —  $ 24,398,073 
Intersegment revenue 321,618  —  (321,618) — 
   Total revenue $ 22,980,541  $ 1,739,150  $ (321,618) $ 24,398,073 
Gross profit $ 10,922,924  $ 664,729  $ —  $ 11,587,653 
Identifiable assets $ 28,264,287  $ 4,097,935  $ —  $ 32,362,222 
Year ended December 31, 2020
Revenue - external customers $ 26,417,398  $ 1,837,181  $ —  $ 28,254,579 
Intersegment revenue 399,744  —  (399,744) — 
   Total revenue $ 26,817,142  $ 1,837,181  $ (399,744) $ 28,254,579 
Gross profit $ 10,159,978  $ 667,536  $ —  $ 10,827,514 
Identifiable assets $ 25,706,960  $ 4,366,693  $ —  $ 30,073,653 
(1) Corporate, intersegment revenue, other and elimination includes various corporate assets.