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Intangible Assets (Tables)
12 Months Ended
Dec. 31, 2018
Goodwill And Intangible Assets Disclosure [Abstract]  
Summary of Intangible Assets

 

Intangible Assets at December 31, 2017

 

Useful
Lives
(Years)

 

 

Cost

 

 

Accumulated
Amortization

 

 

Net Value

 

 

 

(in thousands)

 

Intellectual property

 

 

3

 

 

$

322

 

 

$

322

 

 

$

-

 

License

 

 

5

 

 

 

358

 

 

 

118

 

 

 

240

 

License

 

 

-

 

 

 

218

 

 

 

-

 

 

 

218

 

 

 

 

 

 

 

$

898

 

 

$

440

 

 

$

458