LOAN PORTFOLIO COMPOSITION - Recorded Balance at Original Cost of Troubled Debt Restructurings which were Performing According to Terms of Restructuring (Details 6) - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2017	Dec. 31, 2016
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	$ 1,758,423	$ 2,338,091
Real estate loans | One-to-four family residential
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	540,189	666,744
Real estate loans | Commercial real estate
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	648,294	1,362,088
Real estate loans | Agricultural real estate
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	236,500
Real estate loans | Home equity
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	5,526	6,009
Commercial loans
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	271,593	245,710
Agricultural loans
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing
Consumer loans
Financing Receivable, Modifications [Line Items]
Troubled debt restructurings, original cost, performing	$ 56,321	$ 57,540