5. Goodwill and Intangible Assets

Goodwill

Changes in the carrying amount of goodwill consisted of the following (in thousands):


	Amount
Balance at December 31, 2017	$	21,867
Measurement period adjustments		(37)
Foreign currency translation adjustment		(232)
Balance at September 30, 2018	$	21,598

Goodwill represents the excess of consideration transferred over the fair value of assets acquired and liabilities assumed.

Amortizable Intangible Assets

The Company’s intangible assets and related accumulated amortization consisted of the following as of September 30, 2018 and December 31, 2017 (in thousands):


	September 30, 2018
		Gross Carrying		Accumulated
		Amount		Amortization		Net
Developed technology	$	17,428	$	(9,281)	$	8,147
Customer relationships		12,009		(3,677)		8,332
Trademark/trade name		6,776		(1,293)		5,483
Non-competition agreements		295		(295)		—
Total intangible assets	$	36,508	$	(14,546)	$	21,962

	December 31, 2017
	Gross Carrying		Accumulated
	Amount		Amortization		Net
Developed technology	$	19,626	$	(8,914)	$	10,712
Customer relationships		12,009		(2,556)		9,453
Trademark/trade name		6,776		(869)		5,907
Non-competition agreements		295		(286)		9
Total intangible assets	$	38,706	$	(12,625)	$	26,081

The weighted average amortization period for developed technology, customer relationships, and trademarks/trade names is 6.9 years, 8.4 years, and 12.0 years, respectively; and 7.3 years for all amortizable intangible assets in total.

The Company recorded amortization expense during the three and nine month periods ended September 30, 2018 and 2017 for these intangible assets as follows (in thousands):


	Three Months Ended				Nine Months Ended
	September 30,				September 30,
	2018		2017		2018		2017
Cost of revenue	$	888	$	802	$	2,733	$	2,367
Research and development		17		50		63		145
Sales and marketing		496		482		1,490		1,373
Total amortization of intangible assets	$	1,401	$	1,334	$	4,286	$	3,885

Amortization of finite lived intangible assets as of September 30, 2018 for the next five years is as follows (in thousands):


	Amount
Remainder of 2018	$	1,366
2019		5,593
2020		4,611
2021		2,256
2022		2,093
Thereafter		6,043
	$	21,962