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Delivery Costs (Details) - USD ($) | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jul. 31, 2022 | Jul. 31, 2021 | Jul. 31, 2022 | Jul. 31, 2021
Other Income and Expenses [Abstract] |  |  |  |
Shipping and classroom delivery costs | $ 7,129,000 | $ 5,112,000 | $ 10,383,000 | $ 8,033,000

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- Definition Shipping And Classroom Delivery Costs + References No definition available. + Details
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