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Fair Value Measurements (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2014
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis  
Cash equivalents $ 3,555
Marketable equity securities 87
Cash surrender value of life insurance 4,493
Level 1
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis  
Cash equivalents 3,555
Marketable equity securities 87
Cash surrender value of life insurance 0
Level 2
  
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis  
Cash equivalents 0
Marketable equity securities 0
Cash surrender value of life insurance $ 4,493