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Long-Term Debt and Notes Payable (Details) (USD $)
In Thousands, unless otherwise specified
Jul. 31, 2013
Jan. 31, 2013
Long-term debt and notes payable    
Long-term debt gross $ 269 $ 4,383
Less current portion (130) (145)
Long-term debt 139 4,238
Revolving line of credit [Member]
   
Long-term debt and notes payable    
Long-term debt gross    4,000
Other equipment notes [Member]
   
Long-term debt and notes payable    
Long-term debt gross $ 269 $ 383