Note 8 - Intangible Assets

The following table presents the components of net intangible assets (in thousands):



	As of December 31, 2019							As of December 31, 2018
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Glowpoint
Customer Relationships	$	4,335	$	(4,335	)	$	—	$	4,335	$	(4,335	)	$	—
Affiliate network	994		(666		)	328		994		(597		)	397
Trademarks	548		(504		)	44		548		(446		)	102
Subtotal	5,877		(5,505		)	372		5,877		(5,378		)	499

Oblong Industries
Developed technology	10,060		(504		)	9,556		—		—			—
Trade names	2,410		(60		)	2,350		—		—			—
Distributor relationships	310		(16		)	294		—		—			—
Subtotal	12,780		(580		)	12,200		—		—			—
Total	$	18,657	$	(6,085	)	$	12,572	$	5,877	$	(5,378	)	$	499

Intangible assets with finite lives are amortized using the straight-line method over the estimated economic lives of the assets, which range from five years to twelve years in accordance with ASC Topic 350. The weighted average lives for the components of intangible assets are as follows:



Glowpoint
Affiliate network	12 Years
Trademarks	8 Years

Oblong Industries
Developed technology	5 Years
Trade names	10 Years
Distributor relationships	5 Years

Related amortization expense was $707,000 and $127,000 for the years ended December 31, 2019 and 2018, respectively. Amortization expense for each of the next five succeeding years will be as follows (in thousands):



2020	$	2,429
2021	2,386
2022	2,386
2023	2,386
2024	1,850
Thereafter	1,135
Total	$	12,572