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Note 5 - Goodwill and Intangible Assets (Details) (USD $)
12 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Mar. 31, 2012
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization of Intangible Assets $ 2,979,000 $ 2,601,000 $ 1,490,000
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)     $ 350,000