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Goodwill and Intangible Assets - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]          
Intangible asset amortization $ 205 $ 1,620 $ 610 $ 4,996  
Finite-Lived Intangible Assets [Line Items]          
Fixed asset impairment         $ 66,087
Noctiva | Developed technology          
Finite-Lived Intangible Assets [Line Items]          
Fixed asset impairment         $ 66,087