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Subsequent Events	12 Months Ended
Subsequent Events	Apr. 30, 2020
Subsequent Events [Abstract]
Subsequent Events	Subsequent Events During May 2020, the Company implemented a nationwide reduction in force. Severance and outplacement charges relating to the reduction in force will total approximately $1.5 million and is expected to be completed during fiscal 2021. During June 2020, the Company's Board of Directors approved the closure and eventual disposal of its manufacturing plant located in Humboldt, Tennessee. The manufacturing plant is expected to cease operations in September 2020. The Company expects to incur total pre-tax restructuring costs of $3.0 million to $5.0 million related to the closing of the plant, net of building proceeds. The restructuring costs consist of employee severance and separation costs of approximately $0.5 million to $1.0 million, and charges for asset impairment of property, equipment and inventory of approximately $2.5 million to $4.0 million. The Company expects to recognize substantially all of these costs during fiscal 2021.