Goodwill and Other Intangible Assets (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 4,150,339		$ 4,150,339
Other intangible assets:
Gross carrying amount	3,843,678		3,816,402
Accumulated amortization	(3,709,050)		(3,674,771)
Net carrying amount	134,628		$ 141,631
Amortization of intangible assets	$ 34,279	$ 40,915