Consolidated Statements of Changes in Stockholders' Equity (Unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings, Appropriated [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2011	$ 97,513	$ 35,815,098	$ 76,510,081	$ (31,967,269)	$ 3,657,849	$ 84,113,272
Net income			461,896			461,896
Other comprehensive loss, net of taxes					(233,726)	(233,726)
Stock based compensation		1,803				1,803
Balance at Mar. 31, 2012	97,513	35,816,901	76,971,977	(31,967,269)	3,424,123	84,343,245
Balance at Dec. 31, 2012	97,513	35,811,804	65,532,960	(31,967,269)	5,178,045	74,653,053
Net income			1,566,410			1,566,410
Other comprehensive loss, net of taxes					(760,719)	(760,719)
Stock based compensation		9,274				9,274
Balance at Mar. 31, 2013	$ 97,513	$ 35,821,078	$ 67,099,370	$ (31,967,269)	$ 4,417,326	$ 75,468,018