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Fair value of financial instruments
6 Months Ended
Jul. 31, 2011
Fair value of financial instruments  
Fair Value Disclosures [Text Block]
Fair value of financial instruments. The Company entered into a interest rate swap agreement in May 2010. At July 31, 2011, the interest rate swap agreement was in effect with a notional value of $9.0 million maturing in 2013. The swap agreement, which reduces the exposure to market risks from changing interest rates, exchanges the variable rate to fixed interest rate payments of 2.23% plus LIBOR margin.
 
 
Level 2 significant other observable inputs
 
Other long-term liabilities
 
$217
 
 
 
 
 
Accumulated other comprehensive income
 
(217)