Note 9 - Stockholders' Equity (Detail) (USD $)	5 Months Ended	12 Months Ended
	May 18, 2012	Mar. 31, 2013	Mar. 31, 2012
Common Stock, Shares Authorized		4,000,000	4,000,000
Common Stock, Par or Stated Value Per Share (in Dollars per share)	$ 0.25	$ 0.25	$ 0.25
Common Stock, Dividends, Per Share, Declared (in Dollars per share)	$ 0.30	$ 0.25	$ 0.25
Preferred Stock, Shares Authorized		50,000	50,000
Preferred Stock, Par or Stated Value Per Share (in Dollars per share)		$ 1.00	$ 1.00
Class of Warrant or Right, Exercise Price of Warrants or Rights (in Dollars per Item)			25
Preferred Stock, Redemption Price Per Share (in Dollars per share)			$ 0.01
Rights Agreement [Member] | Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized			3,000
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized			5,000