Note 6 - Intangible Assets

12 Months Ended

Dec. 31, 2019

Notes to Financial Statements

Goodwill and Intangible Assets Disclosure [Text Block]

6. Intangible Assets

The following table presents details of intangible assets:

	December 31, 2019						December 31, 2018
	Gross		Accumulated Amortization		Net		Gross		Accumulated Amortization		Net
Developed technology	$	186,800	$	123,365	$	63,435	$	186,800	$	86,378	$	100,422
Customer relationships		70,540		31,409		39,131		70,540		21,681		48,859
Trade name		2,310		1,766		544		2,310		1,350		960
Patents		1,579		1,010		569		1,579		881		698
Software		74,022		9,411		64,611		61,406		31,898		29,508
	$	335,251	$	166,961	$	168,290	$	322,635	$	142,188	$	180,447

During the year ended December 31, 2018, the Company reclassified $60,500 of acquired in-process research and development to developed technology as the technology was commercialized.

During the year ended December 31, 2017, the Company abandoned a project related to certain developed technology and in-process research and development from the ClariPhy Communications, Inc. (ClariPhy) acquisition resulting in an impairment charge of $47,014, of which $10,174 was included in the cost of revenue and $36,840 was included in the research and development expenses in the consolidated statements of income (loss). The abandonment of the project was primarily related to the change in product roadmap that occurred during the year ended December 31, 2017.

The following table presents amortization of intangible assets for the years ended December 31, 2019, 2018 and 2017:

	Year Ended December 31,
	2019		2018		2017
Cost of revenue	$	36,987	$	32,845	$	28,502
Research and development		22,305		19,311		18,352
Sales and marketing		9,728		9,727		9,727
General and administrative		545		609		643
	$	69,565	$	62,492	$	57,224

Based on the amount of intangible assets subject to amortization at December 31, 2019, the expected amortization expense for each of the next five fiscal years and thereafter is as follows:

2020	$	56,558
2021		52,469
2022		42,656
2023		15,769
2024		672
Thereafter		166
	$	168,290

The weighted-average amortization periods remaining by intangible asset category were as follows (in years):

Developed technology	3.0
Customer relationship	4.0
Trade name	2.0
Patents	7.6
Software	2.7