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Note 3 - Inventories (Tables)
3 Months Ended
Jun. 30, 2015
Inventory Disclosure [Abstract]  
Schedule of Inventory, Current [Table Text Block]
   

June 30, 2015

   

March 31, 2015

 

Raw materials

  $ 10,381     $ 10,366  

Work-in-process

    995       530  

Finished goods

    1,962       1,913  

Less: reserve

    (467 )     (389 )
    $ 12,871     $ 12,420