Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2019

Intangible Assets

Schedule of intangible assets and estimated useful lives

	Estimated useful lives				As of December 31,
	(in years)				2019			2018
Tradename		5	to	7	$	555		$	555
Patents and technological know-how			10			18,494			13,377
Proprietary software		3	to	15		2,981			2,981
Other		3	to	5		323			323
Total intangible assets, gross						22,353			17,236
Accumulated amortization						(8,344	)		(6,987	)
Total intangible assets, net					$	14,009		$	10,249

Schedule of estimated future amortization expense of intangible assets

Years ending December 31,
2020	$	1,398
2021		1,396
2022		1,396
2023		1,389
2024		1,125
Thereafter		7,305
Total	$	14,009