Quarterly report pursuant to Section 13 or 15(d)

Revenue from Contracts with Customers - Summary of Accounts And Notes Receivable And Contract Assets and Liabilities (Details)

v3.10.0.1
Revenue from Contracts with Customers - Summary of Accounts And Notes Receivable And Contract Assets and Liabilities (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2018
Sep. 30, 2018
Dec. 31, 2017
Revenue from Contract with Customer [Abstract]      
Contract Liabilities - current   $ (5,501) $ (1,581)
Contract Liabilities - noncurrent   (2,461) (1,568)
Total contract liabilities $ (3,149) $ (7,962) $ (3,149)
Change in Contract with Customer, Liability [Roll Forward]      
Contract Liabilities (3,149)    
Increase to deferred revenue during current period (7,657)    
Decrease due to recognition of revenue 2,844    
Contract Liabilities $ (7,962)