Note 6 - Facility Relocation (Tables)
 12 Months Ended
Mar. 31, 2017
Notes Tables  
Schedule of Restructuring Reserve by Type of Cost [Table Text Block]
 
 
March 31,
201
7
 
Beginning balance
   $
--
  
Facility relocation expense
    
725
  
Cash payments
    
(52
 )
Ending balance
   $
673