Note 7 - Property, Plant and Equipment (Tables)

9 Months Ended

Jan. 31, 2024

Notes Tables

Property, Plant and Equipment [Table Text Block]

	January 31, 2024			April 30, 2023
Land	$	4,751		$	4,751
Building and improvements		49,448			47,867
Aircraft		4,046			8,515
Machinery and equipment		6,949			5,547
Office furniture and fixtures		14,448			13,881
Leasehold improvements		4,032			4,032
		83,674			84,593
Accumulated depreciation		(24,289	)		(25,526	)
Total property, plant and equipment	$	59,385		$	59,067

Schedule of Useful Life of Property, Plant, and Equipment [Table Text Block]

Description	Estimated useful life
Building and improvements	39 years or the shorter of the estimated useful life of the asset or the underlying lease term
Aircraft	5 years
Machinery and equipment	5 years
Office furniture and fixtures	5 years
Leasehold improvements	Shorter of the estimated useful life of the asset or the underlying lease term