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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
Jan. 31, 2021
Income Tax Disclosure [Abstract]          
Valuation allowance $ 1,144 $ 1,186 $ 1,144 $ 1,186 $ 1,064
Effective tax rate 24.60% 46.80% (36.70%) 11.50%