(

)

GOODWILL AND INTANGIBLE ASSETS

Goodwill and intangible assets on our balance sheets are the result of our acquisitions of Sigma Systems Corp. ("Sigma") in

October 2008,

Thermonics, Inc. ("Thermonics") in

January 2012

and Ambrell in

May 2017.

All of our goodwill and intangible assets are allocated to our Thermal segment. Goodwill totaled

$13,738

at each of

March 31, 2018

and

December 31, 2017.

Intangible Assets

Changes in the amount of the carrying value of finite-lived intangible assets for the

three

months ended

March 31, 2018

are as follows:

Balance - January 1, 2018	$	9,304
Amortization		(216	)
Balance March 31, 2018	$	9,088

The following tables provide further detail about our intangible assets as of

March 31, 2018

and

December 31, 2017:

	March 31, 2018
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Customer relationships	$	10,480	$	1,986	$	8,494
Technology		600		136		464
Patents		590		473		117
Software		270		257		13
Trade name		140		140		-
Customer backlog		500		500		-
Total finite-lived intangible assets		12,580		3,492		9,088
Indefinite-lived intangible assets:
Trademarks		6,710		-		6,710
Total intangible assets	$	19,290	$	3,492	$	15,798

	December 31, 201 7
	Gross Carrying Amount		Accumulated Amortization		Net Carrying Amount
Finite-lived intangible assets:
Customer relationships	$	10,480	$	1,828	$	8,652
Technology		600		95		505
Patents		590		463		127
Software		270		250		20
Trade name		140		140		-
Customer backlog		500		500		-
Total finite-lived intangible assets		12,580		3,276		9,304
Indefinite-lived intangible assets:
Trademarks		6,710		-		6,710
Total intangible assets	$	19,290	$	3,276	$	16,014

We generally amortize our finite-lived intangible assets over their estimated useful lives on a straight-line basis, unless an alternate amortization method can be reliably determined. Any such alternate amortization method would be based on the pattern in which the economic benefits of the intangible asset are expected to be consumed.

None

of our intangible assets have any residual value.

Total amortization expense for our finite-lived intangible assets was

$216

and

$53,

respectively, for the

three

months ended

March 31, 2018

and

2017.

The following table sets forth the estimated annual amortization expense for each of the next

five

years:

2018 (remainder)	$	887
2019	$	1,257
2020	$	1,233
2021	$	1,227
2022	$	1,167