4.	*Intangible Assets*

The amount of identified intangible assets, including the respective amounts of accumulated amortization, are as follows:


	June 30, 2017			December 31, 2016
Database	$	30,923,000		$	28,146,000
Accumulated amortization		(21,763,000	)		(19,974,000	)

Database, net		9,160,000			8,172,000

Customer relationships		14,100,000			14,100,000
Accumulated amortization		(9,725,000	)		(9,263,000	)

Customer relationships, net		4,375,000			4,837,000

Website		19,289,000			17,538,000
Accumulated amortization		(13,742,000	)		(12,624,000	)

Website, net		5,547,000			4,914,000

Intangibles, net	$	19,082,000		$	17,923,000

The Company capitalized approximately $1,529,000 and $1,390,000 during the three months ended June 30, 2017 and 2016, respectively, and approximately $2,777,000 and $2,721,000 during the six months ended June 30, 2017 and 2016, respectively, to the database intangible asset. The Company capitalized approximately $871,000 and $732,000 during the three months ended June 30, 2017 and 2016, respectively, and $1,751,000 and $1,390,000 during the six months ended June 30, 2017 and 2016, respectively, to the website intangible asset.

Amortization expense for intangible assets aggregated approximately $1,696,000 and $3,369,000 for the three and six months ended June 30, 2017, of which approximately $917,000 and $1,789,000 related to the database, which is charged to cost of sales, approximately $231,000 and $462,000 related to customer relationships, which is charged to sales and marketing expense and approximately $548,000 and $1,118,000 related to website development, which is charged to product development expense, all in the Reis Services segment. Amortization expense for intangible assets aggregated approximately $1,434,000 and $2,812,000 for the three and six months ended June 30, 2016, of which approximately $658,000 and $1,270,000 related to the database, approximately $234,000 and $469,000 related to customer relationships, approximately $466,000 and $922,000 related to website development, and approximately $76,000 and $151,000 related to the value ascribed to the below market terms of a then existing office lease.