Quarterly report pursuant to Section 13 or 15(d)

Description of Business and Basis of Presentation - (Details)

v3.10.0.1
Description of Business and Basis of Presentation - (Details) - USD ($)
$ in Thousands
Sep. 30, 2018
Jan. 01, 2018
Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained Earnings $ (101,467) $ (125,669) $ (149,778)
Difference between Revenue Guidance in Effect before and after Topic 606 | Accounting Standards Update 2014-09      
New Accounting Pronouncements or Change in Accounting Principle [Line Items]      
Retained Earnings $ 32,287 $ 24,109