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Note 7 - Goodwill and Intangible Assets - Carrying Amount of Goodwill (Details)
$ in Thousands
12 Months Ended
Mar. 31, 2016
USD ($)
Mar. 31, 2015
USD ($)
Goodwill, beginning of year $ 41,137 $ 38,356
Accumulated impairment losses (13,192) $ (13,192)
Accumulated currency translation adjustment (570)
Net goodwill at beginning of year 27,375 $ 25,164
Goodwill acquired in acquisition 14,887 2,781
Currency translation adjustment 93 (570)
Net goodwill at end of year $ 42,355 $ 27,375