Note 10 - Stockholders' Equity (Details Textual) (USD $)	0 Months Ended
	May 14, 2014	Mar. 31, 2015	Mar. 31, 2014	Dec. 15, 2015
Preferred Stock, Shares Authorized		50,000	50,000
Preferred Stock, Shares Issued		0
Common Stock, Shares Authorized		4,000,000	4,000,000
Common Stock, Par or Stated Value Per Share		$ 0.25	$ 0.25
Stock Repurchase Program, Number of Shares Authorized to be Repurchased	750,000
Preferred Stock, Par or Stated Value Per Share		$ 1	$ 1
Series B Preferred Stock [Member]
Preferred Stock, Shares Authorized		5,000
Related Dividend Declared in Comparison to Per Share of Common Stock	1,000
Liquidation Payment in Comparison to Per Share of Common Stock	1,000
Number of Votes Entitled	1,000
Preferred Stock, Capital Shares Reserved for Future Issuance		3,000
Dividends, Preferred Stock	$ 1
Preferred Stock, Liquidation Preference Per Share	$ 100
Series A Preferred Stock [Member]
Preferred Stock, Shares Authorized		5,000
Other Than Exempt Person [Member]
Common Stock, Par or Stated Value Per Share	$ 85
Rights Agreement [Member]
Class of Warrant or Right, Exercise Price of Warrants or Rights				$ 0.01