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Debt
9 Months Ended
Oct. 31, 2011
Debt [Abstract]  
DEBT
9.  
DEBT
   
In May 2011, the Company entered into a ¥4,000,000,000 ($49,240,000 at issuance) one-year uncommitted credit facility. Borrowings may be made on one-, three- or 12-month terms bearing interest at the LIBOR rate plus 0.25%, subject to bank approval. As of October 31, 2011, the Company had borrowed the full amount under the facility.