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Fair value of financial instruments
9 Months Ended
Oct. 31, 2012
Fair value of financial instruments  
Fair Value Disclosures [Text Block]
Fair value of financial instruments. At October 31, 2012, interest rate swap agreements were in effect with a notional value of $9 million that matures November 30, 2013 and a value of $1.3 million that matures December 2021 . The swap agreements, which reduce the exposure to market risks from changing interest rates, exchanges the variable rate to fixed interest rate payments of 2.23% plus LIBOR margin and 2.47%, respectively. The exchange-traded swaps are valued on a recurring basis using quoted market prices and were classified within Level 2 of the fair value hierarchy because the exchange is not deemed to be an active market. The derivative mark to market of $275 thousand was classified as a long-term liability on the balance sheet.