LOAN PORTFOLIO COMPOSITION - Impaired Loans (Details 4) - Loans Receivable - USD ($)	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2015	Dec. 31, 2014
Accounts Notes And Loans Receivable [Line Items]
Recorded Balance, Total	$ 3,814,125	$ 3,814,125	$ 3,959,047
Unpaid Principal Balance, Total	3,814,125	3,814,125	3,959,047
Specific Allowance, Total	743,561	743,561	695,507
Average Impairment in Impaired Loans, Total	4,011,182	4,075,710	4,484,374
Interest Income Recognized, Total	56,074	164,452	218,710
Interest Income Recognized Cash Basis, Total	35,811	123,799	189,536
Real estate loans | One-to-four family residential
Accounts Notes And Loans Receivable [Line Items]
Loans without a specific valuation allowance, Recorded Balance	115,791	115,791	129,272
Loans without a specific valuation allowance, Unpaid Principal Balance	115,791	115,791	129,272
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	210,213	212,527	220,541
Loans without a specific valuation allowance, Interest Income Recognized	3,050	9,234	12,818
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	3,054	9,008	13,076
Loans with a specific valuation allowance, Recorded Balance	548,811	548,811	584,690
Loans with a specific valuation allowance, Unpaid Principal Balance	548,811	548,811	584,690
Loans with a specific valuation allowance, Specific Allowance	179,667	179,667	183,196
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	561,545	571,398	604,031
Loans with a specific valuation allowance, Interest Income Recognized	7,124	23,641	28,722
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	5,556	18,224	26,783
Recorded Balance, Total	664,602	664,602	713,962
Unpaid Principal Balance, Total	664,602	664,602	713,962
Specific Allowance, Total	179,667	179,667	183,196
Average Impairment in Impaired Loans, Total	771,758	783,925	824,572
Interest Income Recognized, Total	10,174	32,875	41,540
Interest Income Recognized Cash Basis, Total	8,610	27,232	39,859
Real estate loans | Commercial real estate
Accounts Notes And Loans Receivable [Line Items]
Loans without a specific valuation allowance, Recorded Balance	502,635	502,635	564,610
Loans without a specific valuation allowance, Unpaid Principal Balance	502,635	502,635	564,610
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	539,074	709,290	757,616
Loans without a specific valuation allowance, Interest Income Recognized	7,184	27,088	19,826
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	7,280	27,604	18,816
Loans with a specific valuation allowance, Recorded Balance	1,103,595	1,103,595	1,125,641
Loans with a specific valuation allowance, Unpaid Principal Balance	1,103,595	1,103,595	1,125,641
Loans with a specific valuation allowance, Specific Allowance	415,306	415,306	348,240
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	1,116,160	1,119,919	1,134,401
Loans with a specific valuation allowance, Interest Income Recognized	16,970	50,598	66,864
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	14,854	25,383	60,012
Recorded Balance, Total	1,606,230	1,606,230	1,690,251
Unpaid Principal Balance, Total	1,606,230	1,606,230	1,690,251
Specific Allowance, Total	415,306	415,306	348,240
Average Impairment in Impaired Loans, Total	1,655,234	1,829,209	1,892,017
Interest Income Recognized, Total	24,154	77,686	86,690
Interest Income Recognized Cash Basis, Total	22,134	52,987	78,828
Real estate loans | Agricultural real estate
Accounts Notes And Loans Receivable [Line Items]
Loans without a specific valuation allowance, Recorded Balance	862,765	862,765	1,009,889
Loans without a specific valuation allowance, Unpaid Principal Balance	862,765	862,765	1,009,889
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	862,764	865,699	1,037,661
Loans without a specific valuation allowance, Interest Income Recognized	$ 10,897	32,451	58,253
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis		30,345	149,159
Recorded Balance, Total	$ 862,765	862,765	1,009,889
Unpaid Principal Balance, Total	$ 862,765	$ 862,765	$ 1,009,889
Specific Allowance, Total
Average Impairment in Impaired Loans, Total	$ 862,764	$ 865,699	$ 1,037,661
Interest Income Recognized, Total	$ 10,897	32,451	58,253
Interest Income Recognized Cash Basis, Total		30,345	49,159
Real estate loans | Home equity
Accounts Notes And Loans Receivable [Line Items]
Loans without a specific valuation allowance, Recorded Balance	$ 46,607	46,607	27,549
Loans without a specific valuation allowance, Unpaid Principal Balance	46,607	46,607	27,549
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	41,496	41,504	29,505
Loans without a specific valuation allowance, Interest Income Recognized	814	2,454	2,881
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	758	2,394	2,939
Loans with a specific valuation allowance, Recorded Balance	9,982	9,982	9,982
Loans with a specific valuation allowance, Unpaid Principal Balance	9,982	9,982	9,982
Loans with a specific valuation allowance, Specific Allowance	9,982	9,982	9,982
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	9,982	9,982	9,993
Loans with a specific valuation allowance, Interest Income Recognized	204	555	247
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	181	542	187
Recorded Balance, Total	56,589	56,589	37,531
Unpaid Principal Balance, Total	56,589	56,589	37,531
Specific Allowance, Total	9,982	9,982	9,982
Average Impairment in Impaired Loans, Total	51,478	51,486	39,498
Interest Income Recognized, Total	1,018	3,009	3,128
Interest Income Recognized Cash Basis, Total	939	2,936	3,126
Commercial
Accounts Notes And Loans Receivable [Line Items]
Loans with a specific valuation allowance, Recorded Balance	211,169	211,169	240,805
Loans with a specific valuation allowance, Unpaid Principal Balance	211,169	211,169	240,805
Loans with a specific valuation allowance, Specific Allowance	138,606	138,606	154,089
Loans with a specific valuation allowance, Average Impairment in Impaired Loans	266,973	275,280	319,812
Loans with a specific valuation allowance, Interest Income Recognized	722	11,119	14,425
Loans with a specific valuation allowance, Interest Income Recognized Cash Basis	4,111	10,228	16,554
Recorded Balance, Total	211,169	211,169	240,805
Unpaid Principal Balance, Total	211,169	211,169	240,805
Specific Allowance, Total	138,606	138,606	154,089
Average Impairment in Impaired Loans, Total	266,973	275,280	319,812
Interest Income Recognized, Total	5,722	11,119	14,425
Interest Income Recognized Cash Basis, Total	4,111	10,228	16,554
Agricultural
Accounts Notes And Loans Receivable [Line Items]
Loans without a specific valuation allowance, Recorded Balance	411,979	411,979	258,140
Loans without a specific valuation allowance, Unpaid Principal Balance	411,979	411,979	258,140
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	401,995	268,777	358,529
Loans without a specific valuation allowance, Interest Income Recognized	$ 4,093	$ 7,245	13,723
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis			1,046
Recorded Balance, Total	$ 411,979	$ 411,979	258,140
Unpaid Principal Balance, Total	$ 411,979	$ 411,979	$ 258,140
Specific Allowance, Total
Average Impairment in Impaired Loans, Total	$ 401,995	$ 268,777	$ 358,529
Interest Income Recognized, Total	$ 4,093	$ 7,245	13,723
Interest Income Recognized Cash Basis, Total			1,046
Consumer loans
Accounts Notes And Loans Receivable [Line Items]
Loans without a specific valuation allowance, Recorded Balance	$ 791	$ 791	8,469
Loans without a specific valuation allowance, Unpaid Principal Balance	791	791	8,469
Loans without a specific valuation allowance, Average Impairment in Impaired Loans	980	1,334	12,285
Loans without a specific valuation allowance, Interest Income Recognized	16	67	951
Loans without a specific valuation allowance, Interest Income Recognized Cash Basis	17	71	964
Recorded Balance, Total	791	791	8,469
Unpaid Principal Balance, Total	$ 791	$ 791	$ 8,469
Specific Allowance, Total
Average Impairment in Impaired Loans, Total	$ 980	$ 1,334	$ 12,285
Interest Income Recognized, Total	16	67	951
Interest Income Recognized Cash Basis, Total	$ 17	$ 71	$ 964