
		As of June 30, 2025				As of December 31, 2024
(In thousands)	Useful Life (in years)	Gross Carrying Amount		Accumulated Amortization		Gross Carrying Amount		Accumulated Amortization
Acquired technology	6	$	3,100	$	50	$	—	$	—
Customer relationships	5 to 12	36,672		29,980		34,653		28,091
Patents, trademarks, and other	10 to 20	13,426		12,493		13,356		12,437
Total		$	53,198	$	42,523	$	48,009	$	40,528

Amortization expense was $0.7 million and $1.2 million for the three and six months ended June 30, 2025 respectively, compared to $0.7 million and $1.4 million for the three and six months ended June 30, 2024 respectively. Amortization expense includes cost of sales amortization expense directly related to delivering cloud subscription revenue of $0.1 million and $0.2 million for the three and six months ended June 30, 2024 respectively. There was no cost of sales amortization expense for the three and six months ended June 30, 2025. Costs are recorded in "Services and other cost of goods sold" on the condensed consolidated statements of operations.

Certain intangible assets are denominated in functional currencies besides the U.S. dollar and are subject to currency fluctuations.

In connection with the continued execution of cost reductions, during the quarter ended June 30, 2024, the Company decided to stop any incremental development investments supporting its previously acquired blockchain technology and related commercial efforts (see Note 18, Restructuring and Other Related Charges). This asset contributed no revenue as it was still in its investment stage. As a result, the Company wrote-off $0.8 million associated with the remaining unamortized value of this intangible asset in "Services and other cost of goods sold" on the condensed consolidated statements of operations for the three and six months ended June 30, 2024.