Note 4 Other Assets (Narratives) (Details) (USD $)	12 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Available-for-sale Securities, Other Disclosure Items [Abstract]
Other than Temporary Impairment Losses, Investments, Total	$ 1,300,000
Available-for-sale Securities, Change in Net Unrealized Holding Gain (Loss), Net of Tax	60,000	(68,000)
Available-for-sale Securities, Gross Realized Gains	109,000
Available-for-sale Securities, Gross Realized Gains (Loss), Included as Unrealized Gain (Loss) in Accumulated Other Comprehensive Income at Previous Fiscal Year End	$ (64,000)