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, 2022	Jul. 31, 2021
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	$ 50,123	$ 39,493
Over Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	48,008	38,482
Point in Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	2,115	1,011
Domestic
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	37,468	29,663
Domestic | Over Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	35,353	28,652
Domestic | Point in Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	2,115	1,011
International
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	12,655	9,830
International | Over Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	12,655	9,830
International | Point in Time
Disaggregation of Revenue [Line Items]
Net sales transferred to customers	$ 0	$ 0