Goodwill and Intangible Assets, Net

12 Months Ended

Dec. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Goodwill and Intangible Assets Disclosure

NOTE 6. Goodwill and Intangible Assets, Net

Intangible assets consist primarily of developed technology and patent licenses in business combinations. Acquired intangibles are amortized on a straight-line basis over the respective estimated useful lives of the assets.

The carrying values of intangible assets as of December 31, 2019 are as follows (in thousands, except for years):

					December 31,
					2019
	Weighted Average Lives (Years)	Weighted Remaining Average Lives (Years)	Cost		Accumulated Amortization			Net Book Value
Developed technology	4.6	2.7	$	26,356	$	(10,066	)	$	16,290
Patent licenses	14.0	4.7	1,387		(922		)	465
Total intangibles subject to amortization			$	27,743	$	(10,988	)	16,755
Intangible assets not subject to amortization								40
Total intangible assets, net								$	16,795

					December 31,
					2018
	Weighted Average Lives (Years)	Weighted Remaining Average Lives (Years)	Cost		Accumulated Amortization			Net Book Value
Developed technology	5.0	3.8	$	25,456	$	(4,085	)	$	21,371
Patent licenses	14.0	5.9	1,388		(822		)	565
Total intangibles subject to amortization			$	26,844	$	(4,907	)	21,936
Intangible assets not subject to amortization								40
Total intangible assets, net								$	21,976

Intangible assets amortization expenses were $6.1 million, $3.7 million and $0.7 million for 2019, 2018 and 2017 respectively, which were recorded in cost of revenues in the consolidated statements of operations.

As of December 31, 2019, the Company expects amortization expense in future periods to be as follows (in thousands):

2020	$	6,081
2021	6,081
2022	4,427
2023	100
2024	66
2025 and thereafter	—
Total expected future amortization expense	$	16,755

Goodwill, which is not subject to amortization, totaled $7.4 million and $7.2 million as of December 31, 2019, and 2018, respectively.

Changes in the carrying amount of goodwill for the years ended December 31, 2019, 2018 and 2017 were as follows (in thousands):

	Amount
Balance as of December 31, 2017	$	1,549
Goodwill acquired	5,676
Balance as of December 31, 2018	7,225
Goodwill acquired	100
Adjustment	122
Balance as of December 31, 2019	$	7,447