The useful lives in years are as follows:
Computer software and hardware
3 - 5
Demonstration and consignment inventory5
Furniture and fixtures
7
Leasehold improvements
7
Machinery and equipment
7
Property and equipment consisted of the following as of December 31:
20242023
Computer equipment and software$41,355 $37,860 
Demonstration and consignment inventory9,695 9,341 
Leasehold improvements4,095 3,763 
Furniture and fixtures4,586 4,163 
Finance leases15,737 15,737 
Machinery and equipment1,461 2,180 
Assets not yet placed in service269 4,065 
77,198 77,109 
Less accumulated depreciation(50,186)(40,504)
$27,012 $36,605 

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.