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Note 6 - Property, Plant and Equipment (Tables)
12 Months Ended
Mar. 31, 2021
Notes Tables  
Property, Plant and Equipment [Table Text Block]
  

March 31, 2021

  

March 31, 2020

 

Land

 $889  $889 

Buildings

  18,857   18,880 

Manufacturing equipment

  12,163   9,851 

Computer equipment

  4,350   3,601 

Construction in progress

  985   242 

Other

  1,084   1,344 

Gross total

  38,328   34,807 

Accumulated depreciation

  (16,330)  (12,741)

Property, plant and equipment, net

 $21,998  $22,066