Quarterly report pursuant to Section 13 or 15(d)

Income Taxes (Details)

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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jul. 31, 2021
Jul. 31, 2020
Jul. 31, 2021
Jul. 31, 2020
Income Tax Disclosure [Abstract]        
Income tax expense $ 2,506 $ 376 $ 4,309 $ 1,788
Income tax audit reserve 400   400  
Reserve related to several open fiscal years not under audit $ 700   $ 700