Note 5 Other Assets (Available-for-sale Investments) (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Marketable Equity Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	$ 3,658	$ 4,024
Gross Unrealized Gains	509	109
Gross Unrealized (Losses)	(9)	(17)
Fair Value	4,158	4,116
Auction Rate Preferred Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost	350	350
Gross Unrealized Gains	0	0
Gross Unrealized (Losses)	0	0
Fair Value	$ 350	$ 350