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Intangible Assets

12 Months Ended

Dec. 31, 2022

3. Intangible Assets

Intangible assets as of December 31, 2022 and 2021 consisted of the following:

	Estimated useful lives				As of December 31,
	(in years)				2022			2021
Tradename		5	to	7	$	555		$	555
Patents and technological know-how		10	to	20		7,053			33,553
Proprietary software		3	to	15		2,981			2,981
Other		3	to	5		323			323
Total intangible assets, gross						10,912			37,412
Accumulated amortization						(8,841	)		(12,326	)
Total intangible assets, net					$	2,071		$	25,086

Patents and technological know-how as of December 31, 2021 include capitalized legal expenses, net of amortization of $22,637 related to our defense of patents from infringement by our competitors. Legal expenses were capitalized upon satisfaction of two conditions: (a) a determination being made that a successful defense of this litigation is probable, and (b) that the monetary benefits arising out of such successful defense will be in excess of the costs for the defense. The Company capitalized $737 and $7,836 of litigation expenses related to this matter during the twelve months ended December 31, 2022 and 2021, respectively. A gain of $33,623 was recognized and included under other income after deducting the entire capitalized legal costs amounting to $27,374 net of amortized costs of $5,997 from the one-time legal settlement amount of $55,000, which is included in the balance sheet under legal settlement receivable as of December 31, 2022. Please refer to Note 8 - Commitments and Contingencies for additional information.

During the years ended December 31, 2022 and 2021, amortization of these intangible assets were$2,512 and $2,288 respectively.

The estimated future amortization expense of intangible assets is as follows:

Years ending December 31,
2022	$	512
2023		249
2024		188
2025		187
2026		57
Thereafter		878
Total	$	2,071