Consolidated Statements of Changes in Stockholders' Equity - USD ($)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]		AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2013	$ 96,539	$ 35,809,397	$ 38,198,363	[1]	$ 102,881	$ 74,207,180
Net income			4,089,622	[1]		4,089,622	[2],[3],[4]
Other comprehensive income (loss), net					3,065,601	3,065,601
Retirement of common shares	(559)		(456,515)			(457,074)
Stock based compensation expense		59,798				59,798
Dividends			(962,551)			(962,551)
Balance at Dec. 31, 2014	95,980	35,869,195	40,868,919	[1]	3,168,482	80,002,576
Net income			4,683,213			4,683,213
Other comprehensive income (loss), net					(720,584)	(720,584)
Retirement of common shares	(1,123)		(908,049)			(909,172)
Stock based compensation expense		68,705				68,705
Dividends			(953,010)			(953,010)
Balance at Dec. 31, 2015	94,892	35,936,911	43,691,073		2,447,898	82,170,774
Vesting of restricted stock awards, net	35	(989)				(954)
Net income			6,961,262			6,961,262
Other comprehensive income (loss), net					(938,466)	(938,466)
Retirement of common shares	(42)					(42)
Stock based compensation expense		81,889				81,889
Dividends			(1,091,740)			(1,091,740)
Balance at Dec. 31, 2016	94,949	36,018,743	$ 49,560,595		$ 1,509,432	87,183,719
Vesting of restricted stock awards, net	$ 99	$ (57)				$ 42

[1] revised for prior period restatement

[2] revised for prior period restatement

[3] revised for prior period restatement

[4] revised for prior period restatement