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Income Taxes - Company's Deferred Taxes (Detail) - USD ($) $ in Thousands | Jan. 31, 2020 | Jan. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 17,978 | $ 16,696
Tax credit carry forwards | 724 | 675
Stock option book expense | 650 | 781
Allowance for doubtful accounts | 776 | 329
Allowance for inventory obsolescence | 570 | 480
Accruals not yet deductible for tax purposes | 357 | 418
Fixed assets | 851 | 1,255
Intangible assets | 337 | 0
Other | 954 | 876
Gross deferred tax assets | 23,197 | 21,510
Valuation allowance | (23,197) | (21,407)
Deferred tax assets | 0 | 103
Deferred tax liabilities: |  |
Intangible assets | 0 | (35)
Other | (200) | 0
Deferred tax liabilities | (200) | (35)
Unrecognized tax benefits | 0 | 0
Total deferred tax liabilities, net | $ (200) |
Total deferred tax assets, net |  | $ 68

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