Refer below for useful lives by category:
Estimated useful lives
Building and building improvements
3 to 39 years
Computer software and equipment
1 to 10 years
Machinery and equipment
3 to 11 years
Placement and evaluation units5 years
Property, plant and equipment are summarized as follows:
(in thousands)May 31, 2025May 31, 2024
Building and building improvements$16,604 $30,099 
Computer software and equipment29,038 28,407 
Machinery and equipment16,596 15,756 
Placement and evaluation units36,991 31,312 
Construction in progress3,794 2,638 
103,023 108,212 
Less accumulated depreciation(71,116)(69,675)
Less building impairment— (3,364)
31,907 35,173 
Land and land improvements393 493 
$32,300 $35,666 

Historical Timeline

Fiscal YearFiled
2025Jul 18, 2025Showing above
2024Jul 25, 2024
2023Aug 3, 2023
2022Jul 22, 2022
2021Jul 27, 2021
2020Aug 10, 2020
2019Jul 25, 2019
2018Jul 23, 2018
2017Aug 4, 2017
2016Aug 1, 2016

About PP&E Disclosures

The PP&E disclosure details a company's physical asset base — land, buildings, machinery, and equipment — along with the depreciation methods and useful life assumptions that determine how these costs flow through the income statement. Capitalization policy thresholds reveal management's judgment on the boundary between expense and asset, directly affecting both reported earnings and asset values.

Key signals: changes in estimated useful lives or depreciation methods can materially shift reported earnings without any operational change. Compare capital expenditures against depreciation expense — when capex consistently trails depreciation, the asset base may be aging and underinvested. Watch for large asset impairments or write-downs that signal overvalued carrying amounts. Asset retirement obligations reveal future environmental or decommissioning costs that are often underappreciated. Compare PP&E intensity (PP&E-to-revenue) against industry peers to assess capital efficiency and competitive positioning.