Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Mar. 31, 2010	$ 607,831	$ 6,234,079	$ 18,058,730	$ 24,900,640
Balance (in Shares) at Mar. 31, 2010	2,431,326
Net income			1,443,249	1,443,249
Cash dividend			(802,337)	(802,337)
Compensation expense related to stock options				3,200
Compensation expense related to stock options		3,200		3,200
Stock repurchase	(10)	(381)		(391)
Stock repurchase (in Shares)	(40)
Balance at Dec. 31, 2010	607,821	6,236,898	18,699,642	25,544,361
Balance (in Shares) at Dec. 31, 2010	2,431,286
Balance at Mar. 31, 2011	607,821	6,238,498	19,394,295	26,240,614
Balance (in Shares) at Mar. 31, 2011	2,431,286
Net income			1,339,600	1,339,600
Cash dividend			(611,571)	(611,571)
Exercise of stock options	3,750	120,600		124,350
Exercise of stock options (in Shares)	15,000
Compensation expense related to stock options		1,469		1,469
Balance at Dec. 31, 2011	$ 611,571	$ 6,360,567	$ 20,122,324	$ 27,094,462
Balance (in Shares) at Dec. 31, 2011	2,446,286