CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (UNAUDITED) - USD ($)	ADDITIONAL PAID IN CAPITAL [Member]	RETAINED EARNINGS [Member]	TREASURY STOCK [Member]	ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) [Member]	Total
Beginning Balance at Dec. 31, 2015	$ 36,341,744	$ 4,064,834	$ (2,247,415)	$ 992,549	$ 39,151,712
Net income		2,507,846			2,507,846
Other comprehensive income				838,910	838,910
Exercise of stock options	260,546				260,546
Stock-based compensation expense	39,683				39,683
Cash dividends		(1,281,709)			(1,281,709)
Ending balance at Jun. 30, 2016	36,641,973	5,290,971	(2,247,415)	1,831,459	41,516,988
Beginning Balance at Dec. 31, 2016	36,824,022	6,643,476	(2,247,415)	(607,109)	40,612,974
Net income		2,612,473			2,612,473
Other comprehensive income				1,026,912	1,026,912
Exercise of stock options	154,858				154,858
Stock-based compensation expense	36,542				36,542
Cash dividends		(1,390,800)			(1,390,800)
Ending balance at Jun. 30, 2017	$ 37,015,422	$ 7,865,149	$ (2,247,415)	$ 419,803	$ 43,052,959