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Note 5 - Accrued Expenses (Tables)
3 Months Ended
Jun. 30, 2017
Notes Tables  
Schedule of Accrued Liabilities [Table Text Block]
   
June 30, 201
7
   
March 31, 201
7
 
   
(in thousands)
 
Wages
, commissions, bonus and profit sharing
  $
912
    $
793
 
Rent and utilities
   
78
     
69
 
Other accrued expenses
   
153
     
151
 
Total accrued expenses
  $
1,143
    $
1,013