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Note 4 - Property, Plant and Equipment
12 Months Ended
Mar. 31, 2019
Notes to Financial Statements  
Property, Plant and Equipment Disclosure [Text Block]
Note
4.
Property, Plant and Equipment
 
Property, plant and equipment were as follows:
 
   
March 31,
2019
   
March 31,
2018
 
Land
  $
889
    $
889
 
Buildings
   
18,648
     
18,543
 
Manufacturing equipment
   
8,732
     
9,156
 
Computer equipment
   
3,698
     
3,459
 
Construction in progress
   
107
     
60
 
Other
   
1,393
     
1,221
 
Gross total
   
33,467
     
33,328
 
Accumulated depreciation
   
(11,242
)    
(9,735
)
Property, plant, and equipment, net
  $
22,225
    $
23,593
 
 
Depreciation expense for the years ended
March 31, 2019,
2018
and
2017
was
$2,338,
$2,542,
and
$2,287
respectively.