Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation - Narrative (Details)

v3.10.0.1
Basis of Presentation - Narrative (Details)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2018
segment
Sep. 30, 2018
segment
Jan. 01, 2018
USD ($)
Dec. 31, 2017
USD ($)
Finite-Lived Intangible Assets [Line Items]        
Number of reportable segments | segment 2 1    
Accumulated Deficit | Accounting Standards Update 2017-12        
Finite-Lived Intangible Assets [Line Items]        
Impact of adoption of ASU 2017-12       $ (605)
Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2017-12        
Finite-Lived Intangible Assets [Line Items]        
Impact of adoption of ASU 2017-12       605
Adjustments for New Accounting Principle, Early Adoption | Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2017-12        
Finite-Lived Intangible Assets [Line Items]        
Impact of adoption of ASU 2017-12     $ 605  
New Accounting Pronouncement, Early Adoption, Effect | Accumulated Deficit | Accounting Standards Update 2017-12        
Finite-Lived Intangible Assets [Line Items]        
Impact of adoption of ASU 2017-12     $ (605)  
New Accounting Pronouncement, Early Adoption, Effect | Accumulated Other Comprehensive Income (Loss) | Accounting Standards Update 2017-12        
Finite-Lived Intangible Assets [Line Items]        
Impact of adoption of ASU 2017-12       $ 605