4.Capitalized Technology and Content Development Costs

Capitalized technology and content development costs consisted of the following as of:

	June 30, 2016							December 31, 2015
	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
	(in thousands)
Capitalized technology costs	$	10,585	$	(6,681	)	$	3,904	$	8,564	$	(5,697	)	$	2,867
Capitalized technology costs in process	2,356		—			2,356		1,640		—			1,640

Total capitalized technology costs	12,941		(6,681		)	6,260		10,204		(5,697		)	4,507

Capitalized content development costs	29,843		(13,404		)	16,439		24,796		(10,931		)	13,865
Capitalized content development costs in process	4,121		—			4,121		4,256		—			4,256

Total capitalized content development costs	33,964		(13,404		)	20,560		29,052		(10,931		)	18,121

Capitalized technology and content development costs, net	$	46,905	$	(20,085	)	$	26,820	$	39,256	$	(16,628	)	$	22,628

Amortization expense related to capitalized technology was $0.5 million and $0.4 million for the three months ended June 30, 2016 and 2015, respectively. Amortization expense related to capitalized technology was $1.0 million and $0.8 million for the six months ended June 30, 2016 and 2015, respectively. This expense is included in technology and content development costs in the accompanying condensed consolidated statements of operations.

The Company recorded amortization expense related to capitalized content development costs of $1.4 million and $1.0 million for the three months ended June 30, 2016 and 2015, respectively. The Company recorded amortization expense related to capitalized content development costs of $2.6 million and $2.1 million for the six months ended June 30, 2016 and 2015, respectively.

As of June 30, 2016, the estimated future amortization expense for the capitalized technology and content development costs placed in service is as follows (in thousands):

2016	$	3,502
2017	6,423
2018	5,211
2019	3,336
2020	1,705
Thereafter	166

Total	$	20,343