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Goodwill, Other Intangible Assets and Other Assets
3 Months Ended
Mar. 28, 2015
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill, Other Intangible Assets and Other Assets
Goodwill and Other Intangible Assets
Goodwill
The carrying amount of the Company's goodwill at March 28, 2015 is $48.8 million, of which $41.1 million resulted from the acquisition of Evolution Robotics, Inc. in October 2012 and was assigned to the home robots reporting unit. $7.7 million resulted from the acquisition of Nekton Research, LLC completed in September 2008 and was assigned to the defense and security reporting unit.
Other Intangible Assets
Other intangible assets include the value assigned to completed technology and a trade name. The estimated useful lives for all of these intangible assets are three to ten years. The intangible assets are being amortized on a straight-line basis, which is consistent with the pattern that the economic benefits of the intangible assets are expected to be utilized.
Intangible assets at March 28, 2015 and December 27, 2014 consisted of the following:
 
March 28, 2015
 
December 27, 2014
 
Cost
 
Accumulated
Amortization
 
Net
 
Cost
 
Accumulated
Amortization
 
Impairment Loss
 
Net
 
(In thousands)
Completed technology
$
26,900

 
$
8,643

 
$
18,257

 
$
30,600

 
$
9,691

 
1,788

 
$
19,121

Research contracts

 

 

 
100

 
100

 

 

Tradename
100

 
83

 
17

 
800

 
775

 

 
25

Total
$
27,000

 
$
8,726

 
$
18,274

 
$
31,500

 
$
10,566

 
$
1,788

 
$
19,146


During the three month period ended March 28, 2015, the Company removed fully amortized intangible assets from its consolidated balance sheet. Amortization expense related to acquired intangible assets was $0.9 million and $0.9 million for the three months ended March 28, 2015 and March 29, 2014, respectively. The estimated future amortization expense is expected to be as follows:
 
 
(In thousands)
Remainder of 2015
$
2,610

2016
3,457

2017
3,457

2018
3,457

2019
2,818

Thereafter
2,475

Total
$
18,274