Goodwill and Other Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 4,150,339		$ 4,150,339
Other intangible assets:
Gross carrying amount	3,917,606		3,891,241
Accumulated amortization	(3,824,490)		(3,799,907)
Net carrying amount	93,116		$ 91,334
Amortization of intangible assets	$ 24,584	$ 34,279