Commitments and Contingencies (Details) - state	9 Months Ended	12 Months Ended
Feb. 28, 2019	May 31, 2018
Children's Book Publishing and Distribution
Loss Contingencies [Line Items]
Number of states in which sales tax remitted (in states)	38	9

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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