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FAIR VALUE MEASUREMENTS (Tables)
3 Months Ended
Apr. 30, 2013
FAIR VALUE MEASUREMENTS [Abstract]  
Summary of financial assets, measured at fair value
The following table sets forth the financial assets, measured at fair value, as of April 30, 2013 and January 31, 2013:

   
Fair value measurement at reporting date using
 
   
Quoted Prices in
Active Markets for
Identical Assets
(Level 1)
  
Significant Other
Observable Inputs
(Level 2)
  
Significant Unobservable Inputs
(Level 3)
 
      
(in thousands)
    
Money market mutual funds as of April 30,2013
 $50,112  $  $ 
Money market mutual funds as of January 31, 2013
 $44,871  $  $ 
Liability related to interest rate swap as of April 30,2013 $  $(671) $ 
Liability related to interest rate swap as of January 31, 2013$$(384)$
 
Fair values of the derivative instrument
The fair values of the derivative instrument at April 30, 2013 and January 31, 2013 were as follows (in thousands):

 
Asset/(Liability) Derivative
 
 
 
 
Fair Value
 
 
Balance Sheet
Location
 
April 30,
2013
 
 
January 31,
2013
 
Derivative instrument:
 
 
 
 
 
 
 
Interest rate swap........................................................................................................................................................................
Other liabilities
 
$
(671
)
 
$
(384
)
Total.........................................................................................................................................................................................
 
 
$
(671
)
 
$
(384
)