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	$	17,664		$	15,041
Computer and other equipment		2,095			1,071
Leasehold improvements		2,364			2,273
		22,123			18,385
Less: Accumulated depreciation and amortization		(12,635	)		(10,454	)
		9,488			7,931
Construction in progress		1,133			1,784
Total property, plant, and equipment, net	$	10,621		$	9,715

Summary of Depreciation and Amortization Expense

The following table summarizes depreciation and amortization expense, which includes amortization of intangibles, 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	$	1,299	$	1,016	$	1,837
Research and development		203		43		83
Selling, marketing, and distribution		510		114		175
General and administrative (a)		14,955		18,653		21,814
Total depreciation and amortization	$	16,967	$	19,826	$	23,909

General and administrative expenses included $14.4 million, $16.8 million, and $18.6 million of amortization for the fiscal years ended April 30, 2022, 2021, and 2020, respectively, which were recorded as a result of our acquisitions.