Intangible Assets and Liabilities Other Than Goodwill (Tables)

6 Months Ended

Jun. 30, 2021

As of June 30, 2021 and December 31, 2020 the Company had the following amounts related to intangible assets and liabilities other than goodwill:


	June 30, 2021						December 31, 2020
Intangible assets	Cost		Accumulated Amortization		Total		Cost		Accumulated Amortization		Total
Product certifications	$	726,159	$	(505,542)	$	220,617	$	726,159	$	(478,357)	$	247,802
Patents	853,296		(268,379)		584,917		855,014		(220,764)		634,250
Developed technology	240,000		(132,000)		108,000		240,000		(124,000)		116,000
Trademarks	26,896		—		26,896		26,896		—		26,896
In Process R&D	263,936		(9,426)		254,510		263,936		—		263,936
Favorable contract asset	384,465		(335,032)		49,433		384,465		(313,030)		71,435

	$	2,494,752	$	(1,250,379)	$	1,244,373	$	2,496,470	$	(1,136,151)	$	1,360,319

Intangible liability
Unfavorable contract liability	$	2,534,818	$	(1,096,540)	$	1,438,278	$	2,534,818	$	(917,767)	$	1,617,051

Aggregate future amortization over the next five years and thereafter is estimated to be as follows: