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Intangible Assets (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Intangible assets
Intangible Assets, gross	$ 1,399,274	$ 1,281,743
Accumulated amortization	(539,187)	(449,224)
Total	860,087	832,519
Amortization expense of intangible assets	89,963	89,333	$ 82,399
Expected annual amortization expense
2020	89,963
2021	89,963
2022	89,392
2023	88,740
2024	88,439
Patents - in use
Intangible assets
Intangible Assets, gross	304,270	304,270
Patents - in process
Intangible assets
Intangible Assets, gross	120,581	73,164
Internally developed software - in use
Intangible assets
Intangible Assets, gross	867,569	867,569
Internally developed software - in process
Intangible assets
Intangible Assets, gross	80,721	13,723
Trademarks
Intangible assets
Intangible Assets, gross	$ 26,133	$ 23,017

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- Definition

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

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