Note 4 Fair Value (Narratives) (Details) (USD $)	12 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Auction Market Preferred Securities [Abstract]
Collateralized Asset Value Exceeding Value of ARPS Percentage	300.00%
Auction Rate Preferred Securities, Credit Ratings	at least AA
Auction Rate Preferred Securities, Percentage Collateralized	100.00%
Available-for-sale Securities, Other Disclosure Items [Abstract]
Other than Temporary Impairment Losses, Investments, Total	$ 1,900,000	$ 7,000
Debt, Long-term and Short-term, Combined Amount [Abstract]
Debt, Fair Value	$ 49,200,000	$ 51,600,000