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Intangible Assets - Schedule of Amortization of Intangible Assets (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Jun. 30, 2017
Jun. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]        
Amortization of intangible assets $ 231 $ 286 $ 468 $ 576