Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance Beginning at Mar. 31, 2011	$ 607,821	$ 6,238,498	$ 19,394,295	$ 26,240,614
Balance Beginning (in Shares) at Mar. 31, 2011	2,431,286
Compensation expense related to stock options		1,469		1,469
Net income			168,149	168,149
Cash dividend			(611,571)	(611,571)
Exercise of stock options	3,750	120,600		124,350
Exercise of stock options (in Shares)	15,000			15,000
Balance Ending at Jun. 30, 2011	611,571	6,360,567	18,950,873	25,923,011
Balance Ending (in Shares) at Jun. 30, 2011	2,446,286
Balance Beginning at Mar. 31, 2012	611,571	6,308,411	20,132,948	27,052,930
Balance Beginning (in Shares) at Mar. 31, 2012	2,446,286
Net income			417,013	417,013
Cash dividend			(611,571)	(611,571)
Balance Ending at Jun. 30, 2012	$ 611,571	$ 6,308,411	$ 19,938,390	$ 26,858,372
Balance Ending (in Shares) at Jun. 30, 2012	2,446,286