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Income Taxes (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Oct. 31, 2021
Oct. 31, 2020
Oct. 31, 2021
Oct. 31, 2020
Jan. 31, 2021
Income Tax Disclosure [Abstract]          
Valuation allowance $ 1,237 $ 1,133 $ 1,237 $ 1,133 $ 1,064
Effective tax rate 18.20% 7.90% 22.20% 6.60%