CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS' EQUITY - UNAUDITED - USD ($)	Total	Preferred Stock [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
BALANCE at Dec. 31, 2016	$ 105,240,140	$ 12,000	$ 5,896,033	$ 83,463,051	$ 16,871,296	$ (1,002,240)
BALANCE (in shares) at Dec. 31, 2016		12,000	5,896,033
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,643,851				1,643,851
Other comprehensive loss	318,834					318,834
Issuance of common stock	33,223,653		$ 1,840,000	31,383,653
Issuance of common stock (in shares)			1,840,000
Issuance of stock grants	31,791		$ 1,511	30,280
Issuance of stock grants (in shares)			1,511
Exercise of stock options	4,260,734		$ 473,558	3,787,176
Cash dividends on preferred stock	(195,000)				(195,000)
Redemption of preferred stock	(12,000,000)	$ (12,000)		(11,988,000)
Redemption of preferred stock (in shares)		(12,000)
Exercise of stock options (in shares)			473,558
Stock option compensation expense	26,812			26,812
BALANCE at Mar. 31, 2017	132,550,815	$ 0	$ 8,211,102	106,702,972	18,320,147	(683,406)
BALANCE (in shares) at Mar. 31, 2017		0	8,211,102
BALANCE at Dec. 31, 2017	205,851,840		$ 11,152,561	174,008,753	21,888,575	(1,198,049)
BALANCE (in shares) at Dec. 31, 2017			11,152,561
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	3,414,771				3,414,771
Other comprehensive loss	(1,371,394)					(1,371,394)
Exercise of stock options	950,521		$ 81,245	869,276
Exercise of stock options (in shares)			81,245
Restricted stock compensation expense	69,706			69,706
Stock option compensation expense	33,471			33,471
BALANCE at Mar. 31, 2018	$ 208,948,915		$ 11,233,806	$ 174,981,206	$ 25,303,346	$ (2,569,443)
BALANCE (in shares) at Mar. 31, 2018			11,233,806