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Delivery Costs (Details) - USD ($)	3 Months Ended		9 Months Ended
	Oct. 31, 2020	Oct. 31, 2019	Oct. 31, 2020	Oct. 31, 2019
Other Income and Expenses [Abstract]
Shipping and classroom delivery costs	$ 6,014,000	$ 7,897,000	$ 12,999,000	$ 17,154,000

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- Definition

Shipping And Classroom Delivery Costs

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No definition available.

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