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Income Taxes - Components of Deferred Income Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Jan. 31, 2022 | Jan. 31, 2021
--- | --- | ---
Accrued liabilities not currently deductible | $ 5,408 | $ 4,471
Accumulated net operating losses | 10,594 | 12,866
Corporate minimum taxes | 2,346 | 1,596
Difference between tax and accounting basis of property and equipment | 12,021 | 23,754
Research and development and other tax credits and expenses | 1,172 | 1,649
Total deferred income tax assets | 31,541 | 44,336
Difference between tax and accounting basis of intangible assets | (47,255) | (45,030)
Other temporary differences | (2,886) | (2,109)
Total deferred income tax liabilities | (50,141) | (47,139)
Net deferred income taxes | (18,600) | (2,803)
Valuation allowance | (1,961) | (11,365)
Net deferred income taxes, net of valuation allowance | $ (20,561) | $ (14,168)

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