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Note 5 - Long-term Debt (Tables)
6 Months Ended
Sep. 30, 2018
Notes Tables  
Schedule of Debt [Table Text Block]
   
September 30,
2018
   
March 31,
2018
 
Line of credit (3.625%, as of September 30, 2018)
  $
15,500
    $
28,000
 
Term loan (3.750% as of September 30, 2018)
   
17,875
     
18,625
 
Less: discount
   
(312
)    
(365
)
Less: current portion
   
(1,875
)    
(1,625
)
Long-term portion
  $
31,188
    $
44,635
 
Schedule of Maturities of Long-term Debt [Table Text Block]
Year ending March 31,
 
 
 
 
2019
  $
875
 
2020
   
2,125
 
2021
   
2,625
 
2022
   
27,750
 
Total
  $
33,375