Property, Plant and Equipment

3 Months Ended

Jul. 31, 2020

Property, Plant and Equipment [Abstract]

Property, Plant and Equipment

Property, Plant and Equipment

The components of property, plant and equipment were:

	July 31,		April 30,
(in thousands)	2020		2020
Land	$	4,431	$	4,431
Buildings and improvements	120,995		120,819
Buildings and improvements - finance leases	11,636		11,636
Machinery and equipment	313,661		312,806
Machinery and equipment - finance leases	30,972		30,911
Construction in progress	9,158		8,164
	490,853		488,767
Less accumulated amortization and depreciation	(291,765)		(284,943)
Total	$	199,088	$	203,824

Amortization and depreciation expense on property, plant and equipment amounted to $11.6 million and $9.1 million for the three months ended July 31, 2020 and 2019, respectively. The three months ended July 31, 2020 includes accelerated depreciation expense of $1.1 million related to the closure of the Humboldt plant. Accumulated amortization on finance leases included in the above table amounted to $32.8 million and $32.3 million as of July 31, 2020 and April 30, 2020, respectively.