Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 7,331,879	$ 5,157,664	$ 5,594,011
Items not requiring (providing) cash:
Deferred income taxes	624,386	1,080,452	123,091
Depreciation	1,593,974	1,155,642	845,221
Provision for Loan Losses	1,225,000	1,750,000	1,375,000
Gain on sale of Small Business Administration loans	(830,641)	(746,639)	(297,462)
Gain on sale of mortgage loans held for sale and investment securities	(2,022,656)	(2,067,537)	(1,901,015)
Loss (gain) on sale of equipment and other assets	(4,652)	95,863
Loss (gain) on sale of foreclosed assets	315,108	(249,349)	(112,576)
Amortization of deferred income, premiums and discounts, net	481,189	840,340	665,361
Stock award plans	517,053	466,469	373,782
Accretion of purchase accounting adjustments	(3,407,340)
Origination of loans held for sale	(72,116,229)	(70,835,359)	(63,974,589)
Proceeds from sale of loans held for sale	74,551,946	73,118,381	65,402,367
Increase in cash surrender value of bank owned life insurance	(457,451)	(467,730)	(492,978)
Changes in:
Accrued interest receivable	(941,097)	(502,784)	39,629
Prepaid expenses and other assets	6,464,962	1,097,510	563,696
Accrued expenses and other liabilities	(1,620,868)	883,209	(75,505)
Income taxes receivable/payable	620,293	(494,295)	341,305
Net cash provided by operating activities	12,324,856	10,281,837	8,469,338
CASH FLOWS FROM INVESTING ACTIVITIES
Net change in loans	(14,645,559)	(119,195,775)	(51,498,165)
Proceeds from sale of loans receivable	12,997,662	26,781,419
Principal payments received on held-to-maturity securities	4,663	11,071	15,571
Principal payments received on available-for-sale securities	13,358,321	6,649,871	8,884,281
Purchase of available-for-sale securities	(26,151,079)	(15,975,995)	(82,423,495)
Proceeds from sales of available-for-sale securities	13,602,508	20,869,621	76,480,961
Proceeds from maturities of available-for-sale securities			535,000
Purchase of premises and equipment	(3,436,389)	(3,684,707)	(1,175,832)
Net cash received for acquisition	2,455,964
Purchase of tax credit investments	(3,930,176)	(1,415,156)
Proceeds from sale of premises and equipment	2,425,000	2,697,147
(Purchase) redemption of Federal Home Loan Bank stock	(789,700)	13,500	(1,773,500)
Proceeds from sale of foreclosed assets held for sale	292,003	2,448,163	2,922,119
Net cash used in investing activities	(3,816,782)	(80,800,841)	(48,033,060)
CASH FLOWS FROM FINANCING ACTIVITIES
Net increase (decrease) in demand deposits, NOW accounts and savings accounts	(40,855,842)	584,224,702	(8,163,633)
Net increase (decrease) in certificates of deposit	22,077,932	43,576,898	(3,859,312)
Repayment of securities sold under agreements to repurchase	(2,159,000)
Proceeds from FHLB and Federal Reserve advances	609,971,000	761,600,000	223,099,999
Repayments of FHLB and Federal Reserve advances	(600,971,000)	(763,000,000)	(179,499,999)
Proceeds from notes payable	5,000,000
Repayments of notes payable	(3,000,000)
Advances from (repayments to) borrowers for taxes and insurance	109,539	(12,191)	1,607
Proceeds from stock options exercised	166,230	15,570	85,800
Cash dividends paid on common stock	(2,132,221)	(1,767,486)	(1,415,180)
Treasury stock purchased			(371,538)
Net cash provided by (used in) financing activities	(11,793,362)	98,837,493	29,877,744
INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(3,285,288)	28,318,489	(9,685,978)
CASH AND CASH EQUIVALENTS, BEGINNING OF YEAR	37,406,930	9,088,441	18,774,419
CASH AND CASH EQUIVALENTS, END OF YEAR	34,121,642	37,406,930	9,088,441
Supplemental Cash Flows Information
Real estate acquired in settlement of loans	368,878	1,209,279	3,228,589
Interest paid	9,401,351	5,998,844	4,165,281
Income taxes paid, net of (refunds)		1,138,000	724,000
Sale and financing of foreclosed assets held for sale	$ 181,300	$ 1,588,921	$ 149,920