Condensed Parent Information (Details 2) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 5,798,808	$ 1,509,712
Adjustments to reconcile net income to net cash used in operating activities:
Other	3,918,803	(1,200,552)
Net cash provided by operating activities	11,590,741	2,341,425
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of common stock	803,957	4,043,011
Payment of dividends on preferred stock	(752,000)	(120,000)
Net cash provided by financing activities	31,506,275	38,824,705
CASH FLOWS FROM INVESTING ACTIVITIES
Net cash used in investing activities	(54,313,341)	(7,937,911)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	(11,216,325)	33,228,219
CASH AND CASH EQUIVALENTS, beginning of year	79,964,633	46,736,414
CASH AND CASH EQUIVALENTS, end of year	68,748,308	79,964,633
Parent [Member]
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	5,799,000	1,510,000
Adjustments to reconcile net income to net cash used in operating activities:
Equity in undistributed income of subsidiary	(3,520,000)	(2,993,000)
Other	1,234,000	(247,000)
Net cash provided by operating activities	3,513,000	(1,730,000)
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from issuance of note payable	0	6,000,000
Repayment of note payable	(2,000,000)	(4,000,000)
Proceeds from issuance of common stock	804,000	4,043,000
Payment of dividends on preferred stock	(752,000)	(120,000)
Net cash provided by financing activities	(1,948,000)	5,923,000
CASH FLOWS FROM INVESTING ACTIVITIES
Acquisition of Cornerstone Bancshares, Inc.	0	(4,166,000)
Net cash used in investing activities	0	(4,166,000)
NET INCREASE (DECREASE) IN CASH AND CASH EQUIVALENTS	1,565,000	27,000
CASH AND CASH EQUIVALENTS, beginning of year	503,000	476,000
CASH AND CASH EQUIVALENTS, end of year	$ 2,068,000	$ 503,000