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Note 6 - Long-term Debt (Tables)
9 Months Ended
Dec. 31, 2017
Notes Tables  
Schedule of Debt [Table Text Block]
   
December 31
,
2017
   
March 31,
201
7
 
Line of credit (
3.44% at December 31, 2017)
  $
37,500
    $
35,500
 
Term loan
(3.63% at December 31, 2017)
   
19,000
     
19,750
 
Less: discount
   
(392
)    
(450
)
Less: current portion
   
(1,500
)    
(1,125
)
Long-term portion
  $
54,608
    $
53,675
 
Schedule of Maturities of Long-term Debt [Table Text Block]
Year E
nding March 31,
 
 
 
 
201
8
  $
375
 
2019
   
1,625
 
2020
   
2,125
 
2021
   
2,625
 
2022
   
49,750
 
    $
56,500