| Schedule of Intangible Assets | 
As of September 30, 2020 and December 31, 2019 the Company had the following amounts related to intangible assets and liabilities other than goodwill:
 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   |   | September 30, 2020 |   | December 31, 2019 |  
| Intangible assets |   | Cost |   | Accumulated Amortization |   | Total |   | Cost |   | Accumulated Amortization |   | Total |  
| Product certifications |   | $ | 726,159 | 
 |   | $ | (440,592 | ) |   | $ | 285,567 | 
 |   | $ | 726,159 | 
 |   | $ | (399,906 | ) |   | $ | 326,253 | 
 |  
| Patents |   | 880,416 | 
 |   | (218,506 | ) |   | 661,910 | 
 |   | 1,017,108 | 
 |   | (206,499 | ) |   | 810,609 | 
 |  
| Developed technology |   | 240,000 | 
 |   | (120,000 | ) |   | 120,000 | 
 |   | 240,000 | 
 |   | (108,000 | ) |   | 132,000 | 
 |  
| Trademarks |   | 26,896 | 
 |   | — | 
 |   | 26,896 | 
 |   | 26,896 | 
 |   | — | 
 |   | 26,896 | 
 |  
| In Process R&D |   | 263,936 | 
 |   | — | 
 |   | 263,936 | 
 |   | 263,936 | 
 |   | — | 
 |   | 263,936 | 
 |  
| Favorable contract asset |   | 354,858 | 
 |   | (292,004 | ) |   | 62,854 | 
 |   | 274,858 | 
 |   | (263,901 | ) |   | 10,957 | 
 |  
| TTcogen intangible assets |   | 29,607 | 
 |   | (9,252 | ) |   | 20,355 | 
 |   | 29,607 | 
 |   | (6,477 | ) |   | 23,130 | 
 |  
|   |   | $ | 2,521,872 | 
 |   | $ | (1,080,354 | ) |   | $ | 1,441,518 | 
 |   | $ | 2,578,564 | 
 |   | $ | (984,783 | ) |   | $ | 1,593,781 | 
 |  
|   |   |   |   |   |   |   |   |   |   |   |   |   |  
| Intangible liability |   |   |   |   |   |   |   |   |   |   |   |   |  
| Unfavorable contract liability |   | $ | 4,689,025 | 
 |   | $ | (2,483,724 | ) |   | $ | 2,205,301 | 
 |   | $ | 4,689,025 | 
 |   | $ | (2,154,207 | ) |   | $ | 2,534,818 | 
 |  |