| Schedule of Segment Reporting Information | 
The following table presents information by reportable segment for the three and six months ended June 30, 2020 and 2019: 
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   |   |  Products and Services |   | Energy Production |   | Corporate, other and elimination (1) |   | Total |  
| Three months ended June 30, 2020 |   |   |   |   |   |   |   |   |  
|   |   |   |   |   |   |   |   |   |  
| Revenue - external customers |   | $ | 7,158,717 | 
 |   | $ | 276,341 | 
 |   | $ | — | 
 |   | $ | 7,435,058 | 
 |  
| Intersegment revenue |   | 83,050 | 
 |   | — | 
 |   | (83,050 | ) |   | — | 
 |  
|    Total revenue |   | $ | 7,241,767 | 
 |   | $ | 276,341 | 
 |   | $ | (83,050 | ) |   | $ | 7,435,058 | 
 |  
| Gross profit |   | $ | 2,835,526 | 
 |   | $ | 70,465 | 
 |   | $ | — | 
 |   | $ | 2,905,991 | 
 |  
| Identifiable assets |   | $ | 20,343,337 | 
 |   | $ | 2,973,048 | 
 |   | $ | 12,557,068 | 
 |   | $ | 35,873,453 | 
 |  
|   |   |   |   |   |   |   |   |   |  
| Three months ended June 30, 2019 |   |   |   |   |   |   |   |   |  
|   |   |   |   |   |   |   |   |   |  
| Revenue - external customers |   | $ | 7,289,097 | 
 |   | $ | 578,299 | 
 |   | $ | — | 
 |   | $ | 7,867,396 | 
 |  
| Intersegment revenue |   | 83,649 | 
 |   | — | 
 |   | (83,649 | ) |   | — | 
 |  
|    Total revenue |   | $ | 7,372,746 | 
 |   | $ | 578,299 | 
 |   | $ | (83,649 | ) |   | $ | 7,867,396 | 
 |  
| Gross profit  |   | $ | 3,212,170 | 
 |   | $ | 213,745 | 
 |   | $ | — | 
 |   | $ | 3,425,915 | 
 |  
| Identifiable assets |   | $ | 24,448,764 | 
 |   | $ | 3,551,619 | 
 |   | $ | 11,755,993 | 
 |   | $ | 39,756,376 | 
 |  
|   |   |   |   |   |   |   |   |   |  
| Six months ended June 30, 2020 |   |   |   |   |   |   |   |   |  
|   |   |   |   |   |   |   |   |   |  
| Revenue - external customers |   | $ | 14,370,567 | 
 |   | $ | 1,027,191 | 
 |   | $ | — | 
 |   | $ | 15,397,758 | 
 |  
| Intersegment revenue |   | 231,710 | 
 |   | — | 
 |   | (231,710 | ) |   | — | 
 |  
|    Total revenue |   | $ | 14,602,277 | 
 |   | $ | 1,027,191 | 
 |   | $ | (231,710 | ) |   | $ | 15,397,758 | 
 |  
| Gross profit |   | $ | 5,361,247 | 
 |   | $ | 336,911 | 
 |   | $ | — | 
 |   | $ | 5,698,158 | 
 |  
| Identifiable assets |   | $ | 20,343,337 | 
 |   | $ | 2,973,048 | 
 |   | $ | 12,557,068 | 
 |   | $ | 35,873,453 | 
 |  
|   |   |   |   |   |   |   |   |   |  
| Six months ended June 30, 2019 |   |   |   |   |   |   |   |   |  
|   |   |   |   |   |   |   |   |   |  
| Revenue - external customers |   | $ | 14,224,919 | 
 |   | $ | 1,819,108 | 
 |   | $ | — | 
 |   | $ | 16,044,027 | 
 |  
| Intersegment revenue |   | 357,161 | 
 |   | — | 
 |   | (357,161 | ) |   | — | 
 |  
|    Total revenue |   | $ | 14,582,080 | 
 |   | $ | 1,819,108 | 
 |   | $ | (357,161 | ) |   | $ | 16,044,027 | 
 |  
| Gross profit |   | $ | 5,729,997 | 
 |   | $ | 654,677 | 
 |   | $ | — | 
 |   | $ | 6,384,674 | 
 |  
| Identifiable assets |   | $ | 24,448,764 | 
 |   | $ | 3,551,619 | 
 |   | $ | 11,755,993 | 
 |   | $ | 39,756,376 | 
 |  
|   |   |   |   |   |   |   |   |   |  | (1) Corporate, intersegment revenue, other and elimination includes various corporate assets.  |  |