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Goodwill and Other Intangible Assets - Additional Information (Detail) - USD ($)
$ in Thousands
3 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Jan. 31, 2021
Goodwill and Intangible Assets Disclosure [Abstract]      
Impairment expense, percentage of gross carrying amount of goodwill     100.00%
Aggregate amortization expense $ 412 $ 460