Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,157,664	$ 5,594,011	$ 5,716,767
Items not requiring (providing) cash:
Deferred income taxes	1,080,452	123,091	320,738
Depreciation	1,155,642	845,221	918,441
Provision for Loan Losses	1,750,000	1,375,000	600,000
Gain on sale of Small Business Administration loans	(746,639)	(297,462)	(344,818)
Gain on sale of mortgage loans held for sale and investment securities	(2,067,537)	(1,901,015)	(1,758,087)
Loss on sale of equipment and other assets	95,863
Loss (gain) on sale of foreclosed assets	(249,349)	(112,576)	104,670
Amortization of deferred income, premiums and discounts, net	840,340	665,361	704,985
Stock award plans	466,469	373,782	285,589
Origination of loans held for sale	(70,835,359)	(63,974,589)	(56,515,986)
Proceeds from sale of loans held for sale	73,118,381	65,402,367	57,398,682
Increase in cash surrender value of bank owned life insurance	(467,730)	(492,978)	(362,695)
Changes in:
Accrued interest receivable	(502,784)	39,629	43,366
Prepaid expenses and other assets	1,097,510	563,696	1,005,159
Accrued expenses and other liabilities	883,209	(75,505)	(69,305)
Income taxes receivable/payable	(494,295)	341,305	(208,412)
Net cash provided by operating activities	10,281,837	8,469,338	7,839,094
CASH FLOWS FROM INVESTING ACTIVITIES
Net change in loans	(119,195,775)	(51,498,165)	(4,870,934)
Proceeds from sale of loans receivable	26,781,419
Principal payments on held-to-maturity securities	11,071	15,571	17,894
Principal payments on available-for-sale securities	6,649,871	8,884,281	10,445,669
Purchase of available-for-sale securities	(15,975,995)	(82,423,495)	(55,150,017)
Proceeds from sales of available-for-sale securities	20,869,621	76,480,961	33,059,741
Proceeds from maturities of available-for-sale securities		535,000
Purchase of premises and equipment	(3,684,707)	(1,175,832)	(856,106)
Purchase of tax credit investments	(1,415,156)
Proceeds from sale of premises and equipment	2,697,147
Purchase of bank owned life insurance			(4,000,000)
(Purchase) redemption of Federal Home Loan Bank stock	13,500	(1,773,500)	319,400
Proceeds from sale of foreclosed assets held for sale	2,448,163	2,922,119	797,876
Net cash used in investing activities	(80,800,841)	(48,033,060)	(20,236,477)
CASH FLOWS FROM FINANCING ACTIVITIES
NOW accounts and savings accounts	58,424,702	(8,163,633)	43,000,898
Net increase (decrease) in certificates of deposit	43,576,898	(3,859,312)	(5,433,485)
Repayment of securities sold under agreements to repurchase			(10,000,000)
Proceeds from FHLB and Federal Reserve advances	761,600,000	223,099,999
Repayments of FHLB and Federal Reserve advances	(763,000,000)	(179,499,999)	(8,250,000)
Advances from (repayments to) borrowers for taxes and insurance	(12,191)	1,607	46,869
Proceeds from Stock options exercised	15,570	85,800	187,129
Common and preferred cash dividends paid	(1,767,486)	(1,415,180)	(873,499)
Treasury stock purchased		(371,538)
Net cash provided by financing activities	98,837,493	29,877,744	18,677,912
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	28,318,489	(9,685,978)	6,280,529
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	9,088,441	18,774,419	12,493,890
CASH AND CASH EQUIVALENTS, END OF YEAR	37,406,930	9,088,441	18,774,419
Supplemental Cash Flows Information
Real estate acquired in settlement of loans	1,209,279	3,228,589	190,026
Interest paid	5,998,844	4,165,281	4,325,925
Income taxes paid, net of (refunds)	1,138,000	724,000	1,445,000
Sale and financing of foreclosed assets held for sale	$ 1,588,921	$ 149,920	$ 61,200