XML 34 R11.htm IDEA: XBRL DOCUMENT v3.6.0.2
Patents and other intangible assets
12 Months Ended
Dec. 31, 2016
Goodwill And Intangible Assets Disclosure [Abstract]  
Patents and other intangible assets

4.

Patents and other intangible assets

Patents and other intangible assets are recorded at cost, or when acquired as a part of a business combination at estimated fair value. These assets are amortized on a straight-line basis over the useful lives of the assets. The Company’s weighted average amortization period for developed technologies is 11 years.

 

 

 

December 31,

 

(U.S. Dollars, in thousands)

 

2016

 

 

2015

 

Cost

 

 

 

 

 

 

 

 

Patents

 

$

38,348

 

 

$

36,847

 

License and other

 

 

7,611

 

 

 

5,357

 

Trademarks—finite lived

 

 

319

 

 

 

120

 

 

 

 

46,278

 

 

 

42,324

 

Accumulated amortization

 

 

 

 

 

 

 

 

Patents

 

 

(34,717

)

 

 

(33,297

)

License and other

 

 

(3,962

)

 

 

(3,605

)

Trademarks—finite lived

 

 

(138

)

 

 

(120

)

 

 

 

(38,817

)

 

 

(37,022

)

 

 

$

7,461

 

 

$

5,302

 

 

Amortization expense for intangible assets was $1.8 million, $1.7 million and $2.3 million for the years ended December 31, 2016, 2015 and 2014, respectively. Future amortization expense for intangible assets is estimated as follows:

 

(U.S. Dollars, in thousands)

 

Amortization

 

2017

 

$

1,524

 

2018

 

 

886

 

2019

 

 

736

 

2020

 

 

785

 

2021

 

 

743

 

Thereafter

 

 

2,787

 

 

 

$

7,461