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Revenue Recognition - Summary of Net Sales Transferred to Customers at a Point in Time and Over Time (Detail) - USD ($) $ in Thousands	3 Months Ended
	Jul. 31, 2023	Jul. 31, 2022
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	$ 49,839	$ 50,123
Over Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	48,323	48,008
Point in Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	1,516	2,115
Domestic
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	35,420	37,468
Domestic | Over Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	33,904	35,353
Domestic | Point in Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	1,516	2,115
International
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	14,419	12,655
International | Over Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	14,419	12,655
International | Point in Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	$ 0	$ 0

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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