Condensed Consolidated Statement of Stockholders' Equity (Unaudited) (USD $)	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Total
Balance at Beginning of Period at Mar. 31, 2012	$ 611,571	$ 6,308,411	$ 20,132,948	$ 27,052,930
Balance at Beginning of Period (in Shares) at Mar. 31, 2012	2,446,286
Net income			1,277,205	1,277,205
Cash dividend			(611,571)	(611,571)
Compensation expense related to stock options		7,000		7,000
Balance at End of Period at Dec. 31, 2012	611,571	6,315,411	20,798,582	27,725,564
Balance at End of Period (in Shares) at Dec. 31, 2012	2,446,286
Balance at Beginning of Period at Mar. 31, 2013	611,571	6,321,411	21,191,237	28,124,219
Balance at Beginning of Period (in Shares) at Mar. 31, 2013	2,446,286
Net income			1,049,518	1,049,518
Cash dividend			(733,885)	(733,885)
Exercise of stock options	625	24,750		25,375
Exercise of stock options (in Shares)	2,500
Compensation expense related to stock options		17,824		17,824
Repurchase of stock options		(222,740)		(222,740)
Repurchase of common stock	(23,441)	(1,054,776)		(1,078,217)
Repurchase of common stock (in Shares)	(93,758)
Balance at End of Period at Dec. 31, 2013	$ 588,755	$ 5,086,469	$ 21,506,870	$ 27,182,094
Balance at End of Period (in Shares) at Dec. 31, 2013	2,355,028