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Note 5 - Facility Relocation (Tables)
9 Months Ended
Dec. 31, 2018
Notes Tables  
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
Balance at March 31, 2018
   
408
 
Facility Relocation Expense
   
17
 
Cash payments
   
(425
)
Balance at December 31, 2018
   
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