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Intangible Assets

9 Months Ended

Sep. 30, 2021

Intangible Assets

Intangible Assets

5. Intangible Assets

Intangible assets as of September 30, 2021 and December 31, 2020 consisted of the following:

		Estimated useful lives (years)					September 30, 2021				December 31, 2020
Tradename		5	to	7			$	555			$	555
Patents and technological know-how		10	to	20				30,994				25,427
Proprietary software		3	to	15				2,981				2,981
Other		3	to	5				323				323
Total intangible assets								34,853				29,286
Accumulated amortization								(11,674	)			(10,038	)
Total intangible assets, net							$	23,179			$	19,248

The amortization of intangible assets for the three months ended September 30, 2021 and 2020 was as follows:

		Three months ended September 30,								Nine months ended September 30,
		2021				2020				2021				2020
Amortization of intangible assets		$	582			$	446			$	1,636			$	1,220

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

Years ending December 31,		Amount
2021 (Remainder)		$	611
2022			2,445
2023			2,438
2024			2,174
2025			2,113
Thereafter			13,398
Total			23,179