Quarterly report pursuant to Section 13 or 15(d)

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

v3.20.1
Basis of Presentation and Accounting Policies - Revenue Recognition (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 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 (394) (408)
Net contract liabilities arising during the period 7,504 7,351
Balance at end of period $ 7,904 $ 7,911