Presentation of Financial Information - Additional Details (Details) - USD ($)	3 Months Ended
	Mar. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Gross interchange and debit card transaction fees	$ 332,500
Network costs	187,000		$ 86,800
Interchange and debit card transaction fees	$ 145,536		$ 192,394
Tax Cuts and Jobs Act of 2017, Reclassification from AOCI to Retained Earnings, Tax Effect		$ 197,000