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Accrued Expenses (Details) (USD $)
In Thousands, unless otherwise specified
Jan. 31, 2013
Jan. 31, 2012
Summary of Accrued expenses    
Reserve for cash in escrow $ 1,800  
Warranty 350 343
Professional fees 174 246
Health insurance reimbursement reserve 100 150
Dealer commissions 91 149
R&D outsourcing   167
Other 649 752
Total $ 3,164 $ 1,807