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Schedule II - Valuation and Qualifying Accounts (Tables)
 12 Months Ended
Mar. 31, 2019
Notes Tables  
Schedule of Valuation and Qualifying Accounts [Table Text Block]
   
Balance at
    
Charged/
    
Charged to
    
Deductions
    
Balance
  
   
beginning
    
(credited)
    
other
    
from
    
at end
  
   
of period
    
to income
    
accounts
    
reserve
    
of period
  
                                         
Year-ended March 31, 2019:
                                        
Allowance for doubtful accounts
   $
56
     $
1
     $
-
     $
-
 (a)
   $
57
  
Income tax valuation allowance
   $
3,865
     $
6
     $
117
     $
-
 
   $
3,988
  
                                         
Year-ended March 31, 2018:
                                        
Allowance for doubtful accounts
   $
50
     $
33
     $
-
     $
(27
)(a)
   $
56
  
Income tax valuation allowance
   $
1,891
     $
1,396
     $
601
     $
(23
)
   $
3,865