Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of Intangible Assets

Intangible assets are comprised of the following:

		September 30, 2018						December 31, 2017
	Useful Life	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Acquired intangibles - customer lists and non-compete agreements	5-10 years		2,301,300		1,900,658		400,642		1,997,300		1,810,750		186,550
Acquired intangibles - patents and patent rights			500,000		500,000		-		3,155,000		2,603,942		551,058
Patent application costs	Varied (1)		1,168,155		726,412		441,743		1,148,017		664,873		483,144
		$	3,969,455	$	3,127,070	$	842,385	$	6,300,317	$	5,079,565	$	1,220,752

⁽¹⁾ Patent application costs are amortized over their expected useful life which is generally the remaining legal life of the patent. As of September 30, 2018, the weighted average remaining useful life of these assets in service was approximately 7 years.