Patents (Tables)

3 Months Ended

Mar. 31, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Schedule of capitalized patent costs included in other assets

Included in other assets at March 31, 2018 and December 31, 2017 are capitalized patent costs as follows:

	March 31, 2018			December 31, 2017
Patent costs	$	579,065		$	558,873
Less accumulated amortization		(65,888	)		(62,153	)
	$	513,177		$	496,720