Supplemental Financial Data - Schedule of Components of Operating Expenses (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental Income Statement Elements [Abstract]
Bank card interchange fees	$ 653,726	$ 576,359	$ 600,619
Gain on sale of fixed assets	250,460	(97,503)	(1,594)
Other professional fees	499,797	287,273	317,147
Advertising & public relations	248,422	264,269	192,016
Director & board committee fees	301,842	241,523	278,821
FDIC insurance assessment	118,269	233,878	247,963
Telephone expense	$ 309,012	$ 284,586	$ 180,559