Property, plant and equipment, net consisted of the following as of December 31, (in thousands):
20252024
Construction in progress$3,824 $3,201 
Tooling24,362 27,438 
Machinery and equipment7,030 7,280 
Software21,844 18,632 
Leasehold improvements2,539 2,533 
$59,599 $59,084 
Accumulated depreciation and amortization(32,043)(25,072)
Property, plant and equipment, net$27,556 $34,012 

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.