The following table provides the range of estimated useful lives used for each asset type:
Useful Life
(years)
Installed products
3 - 5
Computer software
3 - 5
Computers and electronic equipment
3 - 10
Furniture and fixtures
5 - 7
Leasehold improvementsShorter of useful life or lease term
Plant and equipment
1 - 8
Fixed assets are stated at cost, less accumulated depreciation and amortization, and are summarized as follows (in thousands):

March 31,
20242025
Installed and uninstalled products$11,030 $61,564 
Computer software11,496 11,523 
Computer and electronic equipment6,179 6,294 
Furniture and fixtures2,361 3,054 
Leasehold improvements1,498 1,459 
Plant and equipment— 276 
Assets in progress— 
32,564 84,177 
Accumulated depreciation and amortization(19,845)(26,166)
$12,719 $58,011 

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.