Property, Plant, and Equipment (Tables)

12 Months Ended

Apr. 30, 2021

Property Plant And Equipment [Abstract]

Summary of Property, Plant, and Equipment

The following table summarizes property, plant, and equipment as of April 30, 2021 and 2020 (in thousands):

	April 30, 2021			April 30, 2020
Machinery and equipment	$	15,041		$	12,987
Software and hardware		5,075			4,960
Leasehold improvements		2,273			2,054
		22,389			20,001
Less: Accumulated depreciation and amortization		(13,181	)		(10,854	)
		9,208			9,147
Construction in progress		1,784			530
Total property, plant, and equipment, net	$	10,992		$	9,677

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, 2021, 2020, and 2019 (in thousands):

	For the Years Ended April 30,
	2021		2020		2019
Cost of sales	$	1,016	$	1,837	$	1,969
Research and development		43		83		81
Selling, marketing, and distribution		114		175		39
General and administrative (a)		18,653		21,814		22,901
Total depreciation and amortization	$	19,826	$	23,909	$	24,990

(a) General and administrative expenses included $16.3 million, $18.6 million, and $21.5 million of amortization for the fiscal years ended April 30, 2021, 2020, and 2019, respectively, which were recorded as a result of our acquisitions.