Loans - Past Due Financing Receivables (Details)	Mar. 31, 2018 USD ($) Loan	Dec. 31, 2017 USD ($) Loan
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	93	93
Amount | $	$ 57,865,391	$ 54,768,689
Past Due 30-89 Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	4	3
Amount | $	$ 1,324,345	$ 1,259,100
Past Due 180 Or More Days [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	1	1
Amount | $	$ 139,162	$ 139,643
Total Past Due [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	5	4
Amount | $	$ 1,463,507	$ 1,398,743
Current [Member]
Financing Receivable, Recorded Investment, Past Due [Line Items]
Number of loans | Loan	88	89
Amount | $	$ 56,401,884	$ 53,369,946