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Long-Term Debt and Notes Payable (Details) (USD $)
In Thousands, unless otherwise specified
Oct. 31, 2012
Jan. 31, 2012
Long-Term debt and notes payable    
Long-term debt gross $ 13,616 $ 14,183
Less current portion (142) (1,399)
Long-term debt 13,474 12,784
Revolving Credit Facility [Member]
   
Long-Term debt and notes payable    
Long-term debt gross 13,200 12,550
Equipment note [Member]
   
Long-Term debt and notes payable    
Long-term debt gross   638
MCL notes [Member]
   
Long-Term debt and notes payable    
Long-term debt gross 27 785
SAP equipment notes [Member]
   
Long-Term debt and notes payable    
Long-term debt gross $ 389 $ 210