Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.2
Basis of Presentation and Accounting Policies - Revenue Recognition (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Change in Contract with Customer, Liability [Roll Forward]    
Balance at beginning of period $ 794 $ 968
Previously deferred revenues recognized upon completion of performance obligations during the period (621) (700)
Net contract liabilities arising during the period 5,790 5,443
Balance at end of period $ 5,963 $ 5,711