Note 6

Intangible Assets, net:

Set forth below is a detailed listing of definite-lived intangible assets as of September 30, 2019:

	Balance		Accumulated Amortization			Intangible assets, net
Core technology	$	5,700	$	(2,422	)	$	3,278
Product technology		2,000		(1,700	)		300
Customer relationships		6,900		(2,933	)		3,967
Tradenames		1,500		(638	)		862
	$	16,100	$	(7,693	)	$	8,407

Related amortization expense was $453 and $452 for the three months ended September 30, 2019 and 2018, respectively; and $1,358 and $1,381 for the nine months ended September 30, 2019 and 2018, respectively.

Definite-lived intangible assets are tested for impairment when events or changes in circumstances indicate that the carrying value of the asset group may not be recoverable. The Company recognizes an impairment loss when and to the extent that the recoverable amount of an asset group is less than its carrying value. There were no impairment charges for the three and nine months ended September 30, 2019.

During the three months ended March 31, 2018, the Company wrote off distributor rights of $286 and accumulated amortization of $60 related to the discontinuance of the Nordlys product line and the net value written off of $226 was recorded in selling and marketing expense. In the three months ended June 30, 2018, the Company wrote off distributor liabilities of $237 as a result of the termination of the agreement on May 31, 2018 and the net value written off of $11 was recorded in selling and marketing expense for the nine months ended September 30, 2018.

Estimated amortization expense for the above amortizable intangible assets for future periods is as follows:

Remaining 2019	$	452
2020		1,610
2021		1,410
2022		1,410
2023		1,410
Thereafter		2,115
Total	$	8,407