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Income Taxes - Tax Effects of Temporary Differences that gave Rise to Significant Portions of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified | Jan. 31, 2014 | Jan. 31, 2013
--- | --- | ---
Deferred Tax Assets: |  |
Inventory | $ 1,792 | $ 1,258
Stock-Based Compensation | 535 | 403
State R&D Credits | 258 | 231
Compensation Accrual | 493 | 349
ASC 740 Liability Federal Benefit | 290 | 361
Deferred Service Contract Revenue | 181 | 106
Warranty Reserve | 137 | 135
Reserve for Doubtful Accounts | 127 | 117
Foreign Tax Credit | 213 |
Other | 119 | 166
Deferred Tax Assets, Total | 4,145 | 3,126
Deferred Tax Liabilities: |  |
Accumulated Tax Depreciation in Excess of Book Depreciation | 830 | 532
Deferred Gain on Asset Held for Sale | 897 |
Currency Translation Adjustment | 173 | 189
Other | 78 | 63
Deferred Tax Liabilities, Total | 1,978 | 784
Subtotal | 2,167 | 2,342
Valuation Allowance | (258) | (231)
Net Deferred Tax Assets | $ 1,909 | $ 2,111

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