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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

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