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Note 4 - Property, Plant and Equipment
12 Months Ended
Mar. 31, 2016
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
Note
4.
Property, Plant and Equipment
 
Property, plant and equipment consist of the following (in thousands):
 
 
 
March 31,
 
 
 
201
6
 
 
201
5
 
Land
  $ 1,614     $ 1,614  
Buildings
    4,723       4,721  
Manufacturing equipment
    7,802       6,797  
Computer equipment
    2,649       1,845  
Construction in progress
    7,333       817  
Other
    685       526  
      24,806       16,320  
Less accumulated depreciation
    (8,178 )     (6,722 )
    $ 16,628     $ 9,598  
 
Depreciation expense for the years ended March 31, 2016, 2015 and 2014 was $1,387,000, $981,000 and $865,000, respectively.