The estimated useful lives of property, plant and equipment are as follows (in years):
Estimated Useful Lives
Buildings
39
Research equipment
5
Manufacturing equipment
7 to 10
Furniture
7
Computers and software
3 to 5
Leasehold improvements
  Shorter of asset life or lease term
The following table summarizes the Company’s major classes of property, plant and equipment:
September 30,
20252024
(in thousands)
Land$2,996 $2,996 
Buildings
251,317 75,988 
Research equipment62,758 65,353 
Manufacturing equipment
18,588 — 
Furniture5,594 5,594 
Computers and software1,064 981 
Leasehold improvements104,425 104,410 
Construction in progress15,942 188,731 
462,684 444,053 
Less: Accumulated depreciation and amortization(80,169)(58,021)
Property, plant and equipment, net$382,515 $386,032 

Historical Timeline

Fiscal YearFiled
2025Nov 25, 2025Showing above
2024Nov 26, 2024
2023Nov 29, 2023
2022Nov 28, 2022
2021Nov 22, 2021
2020Nov 23, 2020
2019Nov 25, 2019
2018Dec 11, 2018
2017Dec 12, 2017
2016Dec 14, 2016
2015Dec 14, 2015

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.