Intangible Assets

9 Months Ended

Sep. 30, 2021

8. Intangible Assets

Intangible assets, net consisted of the following as of December 31, 2020:


	Gross Amount		Accumulated Amortization		Net Carrying Value		Amortization Period
Dash acquisition and other intangibles:							(Years)
Customer relationships	$	10,396	$	(5,111)	$	5,285	20




Other, definite lived	3,933		(3,933)		—		2 - 7
Licenses, indefinite lived	764		—		764		Indefinite
Total Dash acquistion and other intangible assets	15,093		(9,044)		6,049

Voxbone acquistion:
Customer relationships	156,559		(1,739)		154,820		15
Developed technology	88,664		(1,478)		87,186		10
Total Voxbone acquisition	245,223		(3,217)		242,006

Total intangible assets, net	$	260,316	$	(12,261)	$	248,055

Intangible assets, net consisted of the following as of September 30, 2021:


	Gross Amount		Accumulated Amortization		Net Carrying Value		Amortization Period
Dash acquisition and other intangibles:							(Years)
Customer relationships	$	10,396	$	(5,501)	$	4,895	20




Other, definite lived	3,933		(3,933)		—		2 - 7
Licenses, indefinite lived	764		—		764		Indefinite
Total Dash acquisition and other intangible assets	15,093		(9,434)		5,659

Voxbone acquisition:
Customer relationships	147,874		(9,037)		138,837		15
Developed technology	83,746		(7,676)		76,070		10
Total Voxbone acquisition	231,620		(16,713)		214,907

Total intangible assets, net	$	246,713	$	(26,147)	$	220,566

The Company recognized amortization expense as follows:


	Three months ended September 30,				Nine months ended September 30,
	2020		2021		2020		2021
Cost of revenue	$	—	$	2,128	$	—	$	6,479


General and administrative	130		2,636		390		8,016
Total amortization expense	$	130	$	4,764	$	390	$	14,495

The remaining weighted average amortization period for definite lived intangible assets is 12.2 years.

Future estimated amortization expense for definite lived intangible assets is as follows: