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Goodwill and Intangible Assets
6 Months Ended
Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]  
Goodwill and Intangible Assets
5.
Goodwill and Intangible Assets
The changes in the carrying value of Goodwill for the six months ended June 30, 2016 were as follows:
 
Goodwill
 
Accumulated
Impairment
Losses
 
Total
Balance as of December 31, 2015
$
60,447

 
$
(43,644
)
 
$
16,803

Foreign currency fluctuations
(3,027
)
 
3,748

 
721

Balance as of June 30, 2016
$
57,420

 
$
(39,896
)
 
$
17,524


The balances of acquired Intangible Assets, excluding Goodwill, as of June 30, 2016 and December 31, 2015, were as follows:
 
Customer Lists and Service Contracts
 
Trade Name
 
Technology
 
Total
Balance as of June 30, 2016
 
 
 
 
 
 
 
Original cost
$
6,550

 
$

 
$
5,201

 
$
11,751

Accumulated amortization
(6,090
)
 

 
(2,682
)
 
(8,772
)
Carrying value
$
460

 
$

 
$
2,519

 
$
2,979

Weighted average original life (in years)
15

 

 
13

 
 

Balance as of December 31, 2015
 

 
 
 
 

 
 

Original cost
$
19,781

 
$
3,859

 
$
6,596

 
$
30,236

Accumulated amortization
(19,232
)
 
(3,859
)
 
(3,950
)
 
(27,041
)
Carrying value
$
549

 
$

 
$
2,646

 
$
3,195

Weighted average original life (in years)
15

 
14

 
13

 
 


The accumulated amortization balances for the year ended December 31, 2015 included fully impaired customer lists, trade name and technology intangible assets that were impaired as a result of our decision to hold the assets and liabilities of the Green Machines outdoor city cleaning line for sale in 2015.
Amortization expense on Intangible Assets for the three and six months ended June 30, 2016 was $112 and $224, respectively. Amortization expense on Intangible Assets for the three and six months ended June 30, 2015 was $516 and $1,036, respectively.
Estimated aggregate amortization expense based on the current carrying value of amortizable Intangible Assets for each of the five succeeding years and thereafter is as follows:
Remaining 2016
$
185

2017
316

2018
310

2019
310

2020
310

Thereafter
1,548

Total
$
2,979