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Note 6 - Long-term Debt (Tables)
12 Months Ended
Mar. 31, 2018
Notes Tables  
Schedule of Long-term Debt Instruments [Table Text Block]
   
201
8
   
201
7
 
   
(in thousands)
 
Long-term debt
  $
6,678
    $
7,139
 
Less current maturities
   
(655
)
   
(623
)
Long-term debt, excluding current maturities
   
6,023
     
6,516
 
Less unamortized debt issuance costs
   
(233
)
   
(267
)
Total long-term debt, net of current maturities and unamortized debt issuance costs
  $
5,790
    $
6,249
 
Schedule of Maturities of Long-term Debt [Table Text Block]
Year ending March 31
 
(in thousands)
 
2019
  $
655
 
2020
   
682
 
2021
   
690
 
2022
   
707
 
2023
   
513
 
Thereafter
   
3,431
 
Total principal payments
  $
6,678