Annual report pursuant to Section 13 and 15(d)

Intangible Assets - Additional Information (Details)

v3.6.0.2
Intangible Assets - Additional Information (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]      
Impairments $ 0 $ 0  
Amortization of intangible assets $ 101 $ 86 $ 150