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Note 4 Other Assets (Available-for-sale Investments) (Details) (USD $)
In Thousands, unless otherwise specified
Mar. 31, 2013
Mar. 31, 2012
Marketable Equity Securities [Member]
   
Schedule of Available-for-sale Securities [Line Items]    
Cost $ 4,024 $ 1,168
Gross Unrealized Gains 109 45
Gross Unrealized (Losses) (17) (149)
Fair Value 4,116 1,064
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