Property, Plant, and Equipment (Tables)

12 Months Ended

Apr. 30, 2022

Property Plant And Equipment [Abstract]

Summary of Property, Plant, and Equipment

The following table summarizes property, plant, and equipment as of April 30, 2022 and 2021 (in thousands):

	April 30, 2022				April 30, 2021
Machinery and equipment	$	299,318		$		284,947
Software and hardware		47,918				46,648
Building and improvements		38,552				36,525
Land and improvements		2,817				2,817
Right of use assets		40,986				40,986
		429,591				411,923
Less: Accumulated depreciation and amortization		(306,350	)			(277,862	)
		123,241				134,061
Construction in progress		12,350				7,551
Total property, plant, and equipment, net	$	135,591		$		141,612

Summary of Depreciation and Amortization Expense

The following table summarizes depreciation and amortization expense, which includes amortization of intangibles and debt financing costs, by line item for the fiscal years ended April 30, 2022, 2021, and 2020 (in thousands):

	For the Years Ended April 30,
	2022		2021		2020
Cost of sales	$	21,879	$	21,026	$	21,142
Research and development		484		519		584
Selling and marketing		509		533		446
General and administrative		7,111		8,606		9,113
Interest expense		90		891		687
Total depreciation and amortization	$	30,073	$	31,575	$	31,972