Assets Manufactured for Internal Use, net

12 Months Ended

Dec. 31, 2022

Assets Manufactured for Internal Use, net

Assets Manufactured for Internal Use, net

Note 8. Assets Manufactured for Internal Use, net

Assets manufactured for internal use, included in other assets, are depreciated using the straight-line method over their 10 year estimated useful life. Their components are as follows:

	December 31,
	2022		2021
	(in thousands)
Internal use assets	$	61,603	$	60,596
Construction in process		2,629		172
Total cost		64,232		60,768
Accumulated depreciation		(33,992)		(28,764)
Assets manufactured for internal use, net	$	30,240	$	32,004

These products are used for research and development, training, and customer demonstration purposes.

Depreciation expense was $5.2 million, $5.3 million and $5.2 million for the years ended December 31, 2022, 2021 and 2020, respectively.