Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policies - Revenue Recognition (Details)

v3.19.1
Basis of Presentation and Accounting Policies - Revenue Recognition (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2019
USD ($)
Change in Contract with Customer, Liability [Roll Forward]  
Balance at beginning of period $ 968
Contract liabilities arising during the period 7,351
Revenue recognized upon completion of performance obligations during the period (408)
Balance at end of period $ 7,911