Property, plant, and equipment, net consists of the following:


		As of December 31,
In Thousands, except useful life	Useful Life (Years)	2025		2024
Property, plant, and equipment, net:
Buildings	10 - 20	$	900	$	900
Leasehold improvements	shorter of lease term or useful life	2,458		4,256
Office furniture and equipment	5 - 10	15,091		15,064

Computer equipment and software	3 - 5	4,737		4,520
Assets in progress	N/A	155		216
Total property, plant, and equipment		23,341		24,956
Less accumulated depreciation and amortization		(17,041)		(13,517)
Total		$	6,300	$	11,439

Depreciation and amortization expense is as follows:


	Years Ended December 31,
In Thousands		2025		2024
Depreciation and amortization expense		$	3,996	$	4,918

Asset Retirement Obligation

Certain lease agreements require the Company to return designated areas of leased space to its original condition upon termination of the lease agreement. At the inception of such leases, the Company records an ARO and a corresponding capital asset in an amount equal to the estimated fair value of the obligation. To determine the fair value of the ARO, the Company estimates the cost for a third party to perform the restoration work. In subsequent periods, for each ARO, the Company records operating expense to accrete the ARO liability to full value and depreciation expense against the ARO, over the term of the associated lease agreement. The Company used a credit-adjusted risk-free rate of 5.6 percent to discount the future obligation, and an inflation rate of 5.0 percent to determine the future value of the original estimate of restoration costs. The ARO was resolved in the fourth quarter of 2025.

The following table presents the changes in the ARO:


In Thousands	Asset Retirement Obligations
Balance as of December 31, 2023	$	273
Accretion expense	15
Balance as of December 31, 2024	288
Accretion expense	10
Costs incurred related to decommissioning leased property	(298)
Balance as of December 31, 2025	$	—