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Intangible Assets

3 Months Ended

Mar. 31, 2019

Goodwill and Intangible Assets Disclosure [Abstract]

Note 5. Intangible Assets

Intangible assets include Miami-Dade County Notices of Acceptances (NOA’s), which are certificates issued for approved products and required to market hurricane- resistant glass in Florida. Also, it includes the intangibles acquired from the acquisition of GM&P.

	March 31, 2019
	Gross		Acc. Amort.			Net
Trade Names	$	980	$	(408	)	$	572
Notice of Acceptances (NOAs), product designs and other intellectual property		10,985		(5,577	)		5,408
Non-compete Agreement		165		(69	)		96
Contract Backlog		3,090		(3,090	)
Customer Relationships		4,140		(1,848	)		2,292
Total	$	19,360	$	(10,992	)	$	8,368

	December 31, 2018
	Gross		Acc. Amort.			Net
Trade Names	$	980	$	(359	)	$	621
Notice of Acceptances (NOAs), product designs and other intellectual property		10,881		(5,373	)		5,508
Non-compete Agreement		165		(60	)		105
Contract Backlog		3,090		(2,832	)		258
Customer Relationships		4,140		(1,626	)		2,514
Total	$	19,256	$	(10,250	)	$	9,006

The weighted average amortization period is 4.9 years.

During the three months ended March 31, 2019 and 2018, the amortization expense amounted to $1,211and $885, respectively, and was included within the general and administration expenses in our Condensed Consolidated Statement of Operations.

The estimated aggregate amortization expense for each of the five succeeding years as of March 31, 2019 is as follows:

Year ending	(in thousands)
2019	$	1,775
2020		2,202
2021		2,172
2022		1,291
2023		720
Thereafter		208
	$	8,368