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Income Taxes (Details 2) (USD $) In Thousands, unless otherwise specified | Jan. 31, 2013 | Jan. 31, 2012
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 1,246 | $ 146
Tax credit carry forwards | 3,449 | 803
Stock option book expense | 2,605 | 2,533
Allowance for doubtful accounts | 1,752 | 1,645
Allowance for inventory obsolescence | 192 | 192
Accruals not yet deductible for tax purposes | 692 | 1,115
Other | 675 | 1,531
Gross deferred tax assets | 10,611 | 7,965
Valuation allowance |  |
Deferred tax assets | 10,611 | 7,965
Deferred tax liabilities: |  |
Fixed assets | (1,841) | (3,617)
Intangible assets | (595) | (774)
Foreign branch taxes | (1,626) | (1,575)
Other | (411) |
Deferred tax liabilities | (4,473) | (5,966)
Total deferred tax assets, net | $ 6,138 | $ 1,999

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