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Note 4 - Property, Plant and Equipment
12 Months Ended
Mar. 31, 2017
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
7
 
 
201
6
 
Land
  $
1,614
    $
1,614
 
Buildings
   
4,726
     
4,723
 
Manufacturing equipment
   
8,861
     
7,802
 
Computer equipment
   
4,143
     
2,649
 
Construction in progress
   
15,882
     
7,333
 
Other
   
1,220
     
685
 
     
36,446
     
24,806
 
Less accumulated depreciation
   
(10,444
)    
(8,178
)
    $
26,002
    $
16,628
 
 
Depreciation expense for the years ended
March 31, 2017,
2016
and
2015
was
$2,287,000,
$1,387,000
and
$981,000,
respectively.